Diversidade climática

Re: Seguimento Europa 2010

You would be suprised of how strong Athens is in mean summer temps.

Below is the record mean temp of Europe.This is the warmest monthly average in the modern history of Europe

31.2C in July 2007.Mean max 36.5 mean min 25.9C Can you find something similar in Andalusia for a period of a whole month?

No. we know that 30,2 C is the local record.

But onto impressive series again. What is the longest stretch of consecutive days of 40.0 C or more in the Athens area? I truely wonder. And how about Larissa or Lamia or Trikkala?
 
Re: Seguimento Europa 2010

No. we know that 30,2 C is the local record.

But onto impressive series again. What is the longest stretch of consecutive days of 40.0 C or more in the Athens area? I truely wonder. And how about Larissa or Lamia or Trikkala?

Well the official stats of so detailed nature are with HNMS.

However I can tell you with certainty that Elefsina airport beats the mean maximum of Larisa so far in August.Elefsina stands with todays temps at 36.26C and Larisa AP stands at 36.17C


As for Trikala we wouldnt know as HNMS has not released official stats for the city.

Now care to explain to us how Elefsina AP is consistantly warmer on average in August compared to Larisa AP and Lamia according to the long term stats of HNMS?

Is it the UHI of Mountain Aigaleo maybe?
 
Re: Seguimento Europa 2010

Off course Crete is in Europe geographically as it sits on the south edge of the Dinarotauric Arrow that streches from Croatia passes through Italy and its south east tip is in the island of Chrisi south of Ierapetra.

So no doubts there.Actually in Italy Lampedusa and some of the islands south of Sicily do not belong in Europe geographically even though Malta does. As far as Canaries and Azores goes ,there seems to be consensus that they do not belong in Europe geographically



http://en.wikipedia.org/wiki/Extreme_points_of_Europe

Here is a view of the Dinarotauric arrow

37663827.jpg

http://www.ukweatherworld.co.uk/forum/forums/thread-view.asp?tid=36444&posts=67&start=1

europen.jpg

Hum...
Se essa divisão geográfica é considerada de acordo com as placas continentais, então parte dos Açores ainda estão na placa europeia.
O Grupo Ocidental ( Flores e Corvo) é que já está na placa americana. :thumbsup:
Mas eu referi-me à Madeira. Mas mesmo os Açores, dentro da placa europeia contudo têm alguns locais com a média anual a rondar os 20ºc ( Ilha do Pico) e níveis de precipitação elevados. Posso colocar aqui a fonte.
Contudo eu não insistiria muito neste ponto, até porque acho que até na P. Ibérica continental, existem locais com potencial de atingir valores semelhantes aos de Ierapetra. Há algum local em Creta com potencial de ser mais quente que Ierapetra?
Hornachuelos tem 19,2ºc, por exemplo, agora resta saber se estes dados são oficiais ou pelo menos fiáveis.
Quanto ao mapa dos «extremos terrestres da Europa», Portugal e Espanha estão um bocado torcidos para Norte, mas ok, já dá para ter alguma ideia. :D
 
Re: Seguimento Europa 2010

Belem,

Actually Ierapetra has an average of 20.1C along with Karpathos Island in the Dodecanese according to the method HNMS uses for means calculation.

However I was referring to the geographical borders of Europe in it's totally as a continent inclusive of isles.On top of that I was also referring to what is widely accepted today as the borders of Europe.Both the Azores and the Canaries seem not to fall to the most widely accepted category of European borders.For that matter neither Pantellaria and Lampedusa in Italy.

As for places in Iberia having the potential to beat Ierapetra mean annual temp this has already been discredited by AEMET's publication of Spain's extreme resume.The highest annual that AEMET accepts is 18.7(or 18.8 dont remember exactly) for Almeria and Seville and in absence of the data of Ierapetra for the corresponding period of the last 15 years.

However I am not sure about Portugal's official standing excluding off course Azore,Flores etc


Em Portugal, não existe neste momento condições para fazer um resumo sobre as suas zonas mais quentes, pois não existem estações nessas zonas.
O mais próximo que se encontrou foi o caso do porto de Alcoutim, em que felizmente no lado espanhol ( claro! lol) existia uma estação em funcionamento a pouca distância, mas que contudo não se enquadra nas zonas mais quentes de Portugal definidas oficialmente pelo IM, através de um artigo publicado em 2002.
 
Re: Seguimento Europa 2010

Em Portugal, não existe neste momento condições para fazer um resumo sobre as suas zonas mais quentes, pois não existem estações nessas zonas.
O mais próximo que se encontrou foi o caso do porto de Alcoutim, em que felizmente no lado espanhol ( claro! lol) existia uma estação em funcionamento a pouca distância, mas que contudo não se enquadra nas zonas mais quentes de Portugal definidas oficialmente pelo IM, através de um artigo publicado em 2002.


Ok one more question...do you know what is the highest ever recorded temprerature in Portugal in the winter?

December,January and February?
 
Re: Seguimento Europa 2010

Elefsina is catagorised as suburban by the same study you referred me to.
Megara is still close to buildings. It depends where that station is sighted but it is either close to the airstrip or close to the houses. So we need more info on that. Athens AP is 1-3 km away from any city and in large part surrounded by open country. Elefsis is clearly not. Megara: not like the AP at all.


Given the fact that heatisles are well known in every town or city, I think the exception needs to be proved not the rule.

It is very clear I agree with Seville and Athens. Like I said and I'll say again: the Athens area is STILL quite possibly the warmest area when it comes to minima and average temperatures.

But how about Hornachuelos then...It has a record of 1930-1969 (or so, at least more than 30 years) and it has an average of 28,9 C over that period in july. According to your logic, you need to disprove that one. How about that one then?

And Badajoz Instituto had 31,0 C as a Tmed in 1866. It is still on the site of the AEMET. With a tmedof the maximum of 42,3 C. Also on their site. Credible?

The Athen observatory is at 35,3 C according to my data. Athens airport
34,0C, Elefsis 36,2 C. Minima: Elefsis 26.2, Athens AP 22.9 and 25.5 for Athens airport.

Now look: a more exposed part in itself can explain a lot of Athens AP temperatures. And more exposed to the sea, could certainly explain a somewhat lower daytime max. But it certainly cannot explain the also much lower minimum temperature. at day, you have a seabreeze and may be it kicks in earlier there. At night, there are no seabreezes to speak of. So we would expect the most exposed areas to have higher temperatures. Instead, we see Athens AP having significantly LOWER temperatures.

The seawater is 27 C currently. Thiseio at 5 km from the see, much like the airport, is not any cooler than the sea nearby on average at night. So how can that be? No heatisle effect may be? Oke, where I live it is much colder in summer and winter than you guys there. My stations is 10 km inland. We have KNMI station at 60 m from the sea. It registered 16,1 C and my station 14,1 C. The seatemperature is 19 C or so. So even 60 m from the seaboard it is still clearly colder. And the water is surrounding the station form ll sides as you can see.

Here are the coordinates of the KNMI station. 51.26.28.28 N and 3.35.45.06 E.

So Athens has all the signs of a clear heatisle effect, but somehow here it doesn't count...Right. Everywhere else in the world we see the exact same behaviour, and it is called UHI but in Athens some people call it "normal".

It is no different than Sevilla, only it is bigger.

The Guadalquivir region: even the Atlantic coast is now at 22-25 C. All stations BAR Sevilla San Pablo.... are cooler. On averag, any station in Sevilla is much cooler than the sea when it comes to daytime minima. 19 C or so and the average sea temp on the atlantic side will be 21-23 C.

And still, I think that Athens or Greece could be the warmest place on those values you value most. I have not looked at Catania or other Italian places that may come very close on average.

I honestly don't care if Athens is warmer on average, minima or even maxima or not. If it is so, it is. Who cares. it is not a competition, to me not at least. My main focus are those high maxima. I see you start comparing those too. It is very clear that the Guadalquivir (and Guadiana) region is clearly warmer on that one, 2-3 C on average in many stations. Nothing to be proud of but there is no doubt from this perspective.


Well the accurate definition of an area being warm means ''on average'' at least this is what laymen meteorologists define it as.So in this sense the myth is totally disconstructed since we know that Athens has consistently the highest mean and which you fail to proove to us accademically how the mean in this station in Athens is influenced.

However even if I make you the favour and willingly disqualify the Observatory,then suburban Seville does not stand a chance against ''suburban'' Athens with the Elefsina station which is off course the official european temperature holder.

But it seems you have not been checking the comparisons very well.Megara station 45km to the west beats the Observatory minimums.Give us your theory around Megara in Attica as well?Is it influenced by Athens as well or is that Athens has been consistantly the warmest area of Europe in the summer due to Attica's unique geomorphology and geospatial position?

Also how does my participition in other forums even if I post 3million posts discredits what I say?

Btw as of today the Observatory beats the mean max of San Pablo so far for August...

Here is the standing so far untill yesterday

screenshot576.jpg
 
Re: Seguimento Europa 2010

O Atlântico junto à foz do Guadalquivir está agora entre 26-27ºc segundo o satélite NOAA-17 e NOAA-18 ( fonte AEMET). O rigor é extremo neste caso.
O mesmo valor para a zona de Tavira e Monte Gordo ( Algarve).


Ok one more question...do you know what is the highest ever recorded temprerature in Portugal in the winter?

December,January and February?

Infelizmente não disponho de dados que me permitam responder a essa pergunta.
Talvez alguém tenha.
 
Re: Seguimento Europa 2010

Elefsina is catagorised as suburban by the same study you referred me to.
Megara is still close to buildings. It depends where that station is sighted but it is either close to the airstrip or close to the houses. So we need more info on that. Athens AP is 1-3 km away from any city and in large part surrounded by open country. Elefsis is clearly not. Megara: not like the AP at all.


Given the fact that heatisles are well known in every town or city, I think the exception needs to be proved not the rule.

It is very clear I agree with Seville and Athens. Like I said and I'll say again: the Athens area is STILL quite possibly the warmest area when it comes to minima and average temperatures.

But how about Hornachuelos then...It has a record of 1930-1969 (or so, at least more than 30 years) and it has an average of 28,9 C over that period in july. According to your logic, you need to disprove that one. How about that one then?

And Badajoz Instituto had 31,0 C as a Tmed in 1866. It is still on the site of the AEMET. With a tmedof the maximum of 42,3 C. Also on their site. Credible?

The Athen observatory is at 35,3 C according to my data. Athens airport
34,0C, Elefsis 36,2 C. Minima: Elefsis 26.2, Athens AP 22.9 and 25.5 for Athens airport.

Now look: a more exposed part in itself can explain a lot of Athens AP temperatures. And more exposed to the sea, could certainly explain a somewhat lower daytime max. But it certainly cannot explain the also much lower minimum temperature. at day, you have a seabreeze and may be it kicks in earlier there. At night, there are no seabreezes to speak of. So we would expect the most exposed areas to have higher temperatures. Instead, we see Athens AP having significantly LOWER temperatures.

The seawater is 27 C currently. Thiseio at 5 km from the see, much like the airport, is not any cooler than the sea nearby on average at night. So how can that be? No heatisle effect may be? Oke, where I live it is much colder in summer and winter than you guys there. My stations is 10 km inland. We have KNMI station at 60 m from the sea. It registered 16,1 C and my station 14,1 C. The seatemperature is 19 C or so. So even 60 m from the seaboard it is still clearly colder. And the water is surrounding the station form ll sides as you can see.

Here are the coordinates of the KNMI station. 51.26.28.28 N and 3.35.45.06 E.

So Athens has all the signs of a clear heatisle effect, but somehow here it doesn't count...Right. Everywhere else in the world we see the exact same behaviour, and it is called UHI but in Athens some people call it "normal".

It is no different than Sevilla, only it is bigger.

The Guadalquivir region: even the Atlantic coast is now at 22-25 C. All stations BAR Sevilla San Pablo.... are cooler. On averag, any station in Sevilla is much cooler than the sea when it comes to daytime minima. 19 C or so and the average sea temp on the atlantic side will be 21-23 C.

And still, I think that Athens or Greece could be the warmest place on those values you value most. I have not looked at Catania or other Italian places that may come very close on average.

I honestly don't care if Athens is warmer on average, minima or even maxima or not. If it is so, it is. Who cares. it is not a competition, to me not at least. My main focus are those high maxima. I see you start comparing those too. It is very clear that the Guadalquivir (and Guadiana) region is clearly warmer on that one, 2-3 C on average in many stations. Nothing to be proud of but there is no doubt from this perspective.


Where did you get your data of the values you claim for Athens Observatory?

Here you can see an open debate with all of Europe having free access where myself and Ian Williams collect the daily stats of the Greek stations (behind me two more guys help me with the collection)

http://www.ukweatherworld.co.uk/forum/forums/thread-view.asp?tid=38292&start=181&posts=187

You can see the daily stats.The correct values are 36.82 max and not 35.3 which you quote out of the blue

Now if you notice the academic paper of 1985 it does not offer any values on Elefsina AP however it offers the mins of the Observatory and it is clear that for the period of the study the mins in the Observatory have increased by 0.3C against the whole record!!

Regarding Megara the station is at the edge of a 30.000 city cut away from Athens both from Aigaleo mountain and Gerania Mountain further to the west of Elefsina

Regarding Elefsina we have been through this.Apart from the fact that it cut away from the mountain it's airport is no different than Tablada and Larrisa in terms of building proximity and beats them both and by far

What you need to be doing is to give us an academic reference of the exact UHI of a 30.000 city airport and on top off that take in account the extreme Athens basin geomorhopology.

Again the El.Venizelos airport has a few years of data and as I said I am not going to give again lessons on the Mesogheia's Plain totally different climate compared to the extreme complexity of the Athens basin as it is characterized by academia.

Now more interestingly again you quote a non WMO 28.9C average from who ?Martinez?From Spain or Portugal?Can you provide us the WMO id of that station and the link where it appears that it is a ''primera ordern'' AEMET station. You are aware that most of non first line AEMET stations are not WMO accredited in case you are referring to Spain.
 
Re: Seguimento Europa 2010

O Atlântico junto à foz do Guadalquivir está agora entre 26-27ºc segundo o satélite NOAA-17 e NOAA-18 ( fonte AEMET). O rigor é extremo neste caso.
O mesmo valor para a zona de Tavira e Monte Gordo ( Algarve).

So, any stations on the coast having daytime minima HIGHER than the seatemperatures anywhere in the region? Lets see:

Faro is at 22.5 C. It is located in the Ria, I have been there many times. Unless they do not measure at the airport. The watertemperatures is 24 C. So it is of course cooler.

Malaga: seawater 25 C according to wetteronline, average Tmin 23,6 C. Lower.
Catania: 19,8 seaw 26 C. Palermo: 22.8 seawater 27 C.
Antalya: 25,7 seaw 30 C...Etc.

The list goes on and on. Now Athens AP fits in well, all other places in the Athens region do not. Heatisle effect can explain it, I know of nothing else that can and that only happens in Athens...
 
Re: Seguimento Europa 2010

Penso que uma das formas de saber se Atenas e arredores sofrem da «influência urbana» é medir os níveis de CO 2 no mesmo local onde se situam as estações meteorológicas.
 
Re: Seguimento Europa 2010

So, any stations on the coast having daytime minima HIGHER than the seatemperatures anywhere in the region? Lets see:

Faro is at 22.5 C. It is located in the Ria, I have been there many times. Unless they do not measure at the airport. The watertemperatures is 24 C. So it is of course cooler.

Malaga: seawater 25 C according to wetteronline, average Tmin 23,6 C. Lower.
Catania: 19,8 seaw 26 C. Palermo: 22.8 seawater 27 C.
Antalya: 25,7 seaw 30 C...Etc.

The list goes on and on. Now Athens AP fits in well, all other places in the Athens region do not. Heatisle effect can explain it, I know of nothing else that can and that only happens in Athens...

Then provide to us the exact location of the sea temps measurements.Do I need to remind you the NTUA paper on the warm waters of Elefsina as the warmest in the Argosaronic gulf?
And again how exacltly are you taking into account the extreme geomorphology of the Athens basin?Should I start copy pasting again the extract of what an academic paper say's about the difficulty of measuring the Athens UHI?

You seem to on purpose avoid ackowledging the extreme geomoprhology of the Athens basin even though you have been academically refuted.
Apart from bs unofficial sites like tutiempo ,martinez, weatherithinkitisok online etc and arbitrary personal opinions do you have a real academic refutation on the exact UHI of the particular stations?
 
Re: Seguimento Europa 2010

Is there any study, preferably with models (windmodelling may be nice) for the athens basin? Elefsina is quoted as suburban in the study.
I already showed you a graph about how fast the temperatures rises with just a few buildings and 30000 people was more then enough. You discredited that one as it was an average....Yes, what do you want. One city of 30000 people as an indication or hundreds and average it??

Here is a part of the Spencer study: "A population density of only 100 persons per sq. km exhibits average warming of about 0.8 deg. C compared to a nearby unpopulated temperature monitoring location."

30000 people on 2 km2 , which is the size of Megara is 15000 people per km2. In fact, this is already of the map of Spencer...but it will be near 2 K temperature rise. (1000 is 1,6K) or so. But in all fairness: Megara is not located in the city but 1 km away and only is affected by a NW wind. It is more that there are buildings next to it in virtually all directions, bar NE.
The airstrip itself acts as city like environment as well, certainly if the station is located right next to it.

I never got a lecture by you about the Athens basin, other than you constantly saying how exceptional it is.
WMO: can you show me one area of the Athens observatory that will comply to WMO guidelines? One place, with not a single tree or building within a 200 m radius let alone 400? Saying it is not WMO does not discredit a station just like that nor does WMO stations prove they are. I showed you Arcen station of the KNMI, surrounded by large trees 270 degrees around the station within 20-30 m! Oke then, because it is WMO? That is nonsense. Thiseio: any place there which comes close to WMO norms?

In short: in case of doubts we must know where the sensorscreen is located, even which screen is used (stevenson or radiation shield?) etcetc.


Where did you get your data of the values you claim for Athens Observatory?

Here you can see an open debate with all of Europe having free access where myself and Ian Williams collect the daily stats of the Greek stations (behind me two more guys help me with the collection)

http://www.ukweatherworld.co.uk/forum/forums/thread-view.asp?tid=38292&start=181&posts=187

You can see the daily stats.The correct values are 36.82 max and not 35.3 which you quote out of the blue


Now if you notice the academic paper of 1985 it does not offer any values on Elefsina AP however it offers the mins of the Observatory and it is clear that for the period of the study the mins in the Observatory have increased by 0.3C against the whole record!!

Regarding Megara the station is at the edge of a 30.000 city cut away from Athens both from Aigaleo mountain and Gerania Mountain further to the west of Elefsina

Regarding Elefsina we have been through this.Apart from the fact that it cut away from the mountain it's airport is no different than Tablada and Larrisa in terms of building proximity and beats them both and by far

What you need to be doing is to give us an academic reference of the exact UHI of a 30.000 city airport and on top off that take in account the extreme Athens basin geomorhopology.

Again the El.Venizelos airport has a few years of data and as I said I am not going to give again lessons on the Mesogheia's Plain totally different climate compared to the extreme complexity of the Athens basin as it is characterized by academia.

Now more interestingly again you quote a non WMO 28.9C average from who ?Martinez?From Spain or Portugal?Can you provide us the WMO id of that station and the link where it appears that it is a ''primera ordern'' AEMET station. You are aware that most of non first line AEMET stations are not WMO accredited in case you are referring to Spain.
 
Re: Seguimento Europa 2010

Then provide to us the exact location of the sea temps measurements.Do I need to remind you the NTUA paper on the warm waters of Elefsina as the warmest in the Argosaronic gulf?
And again how exacltly are you taking into account the extreme geomorphology of the Athens basin?Should I start copy pasting again the extract of what an academic paper say's about the difficulty of measuring the Athens UHI?

You seem to on purpose avoid ackowledging the extreme geomoprhology of the Athens basin even though you have been academically refuted.
Apart from bs unofficial studies and arbitrary personal opinions do you have a real academic refutation on the exact UHI of the particular stations?

Please do so, I haven't read it. And I want to know how it is affected, why it excerts this effect. With some calculations, some models and not some guesses. If that paper is academic, it is pretty laughable to me. It comes with no explanation other than the this geomorphology is selfexplicatory. I want to see it quantified, not guessed. And the trend story in that study is even worse. And that in a country with such a history on science, thinking....but okey.
 
Re: Seguimento Europa 2010

I am not sure which value that is. It is either 47,2 or 47,8.

So you are impressed by Murcia for its high maximum. But you are having this crucade for Attica to be the warmest and not Guadalquivir, based on the average. Your reply shows why it is and always will be the Guadalquivir: because people like you are looking at those constant high maxima and not at average.
You find the 40-41 average "boring". A 30 C 24h average for a whole month is more exciting you think? I goes by unnoticed.

Murcia hit what, 47,2 or 47,8 as a max (47,8 being questioned I believe). How is that so much warmer than the 47,4 in Amareleja or slightly lower values in Cordoba and Sevilla (47,2 or so?).
If 44 C excites you, mindyou that the average over a 17 day period was 43,0 C in Amareleja. That is 17 days in a row what Murcia achieves just occasionaly.

Because Murcia is cooler generally, the 43-44 C temperatures are less expected an therefor seem more special. If it happens in the Portuguese and Spanish valleys near Moura-Merida and Sevilla-Cordoba, no one thinks it is as special.

Europe seems to be impressed by Sevilla-Cordoba and no other place. In the NEtherlands, the Portuguese interior is in fact mentioned many times togeter with Andalucia during the meteotalk at the end of each newsitem when it comes to incredible summerheat. I have never seen any mention of Athens or Murcia or any other place discussedon this forum the last 3 years or so. 35 C is not impressive, 40 C seems to be...

Well I do not really care what you believe or what you like for that matter.I like the real extreme dynamic and this is neither in Portugal nor Andalusia.In Iberia only Murcia has what it takes for extremes having all the official records.It is by far the easiest place to reach 50.0C in Iberia!

Strange that you havent seen Athens being mentioned the last 3 years considering Athens has topped yet again the Portuguese national record with the amazing 47.5C in June 2007 in N.Filadelfeia!It seems that the boring 40-41's are of greater interest compared to the 48C Athens has managed in two areas on the same date and which btw Portugal has never reached officially!