Comments on: Phoenix and Tokyo: "Traditional" UHI

By: realclimate and Disinformation on UHI « Climate Audit

realclimate and Disinformation on UHI « Climate Audit — Wed, 31 Mar 2010 16:46:13 +0000

[...] adjustments outside the U.S. even begin to deal with the problem. Posts were here here here here here [...]

By: Shibuya

Shibuya — Fri, 01 May 2009 15:37:00 +0000

Thanks for this information, Japan is very concerned over climate change.

By: bobclive

bobclive — Mon, 19 May 2008 18:58:18 +0000

UBAN HEAT ISLAND AND ITS FEATURE IN ADDIS ABABA (A CASE STUDY).

Bisrat Kifle, National meteorological agency

Addis Ababa, Ethiopia.

The total population increase in the 18 years (1967-1984 was 739, 591 and the annual mean maximum temperature in the same period became warmer by 1.7 degrees C. The annual mean maximum temperature attained lts peak in the year 2000. It is interesting to observe that the urban population was also the highest in that same year.

http://www.geo.uni.lodz.pl/~icuc5/text/P_6_11.pdf

By: Sam Urbinto

Sam Urbinto — Wed, 12 Mar 2008 16:39:16 +0000

More likely, the switch in mean monthly anomaly means from mixed to almost exclusivly positive that happened between around 1975-1990 has created a new level in the playing field.

By: bobclive

bobclive — Wed, 12 Mar 2008 14:42:05 +0000

IF UHI is a major contributor to the temperature rise seen by the ground stations since say 1900 would it be reasonable to conclude that at some point in time the urban stations could swamp the few remaining rural stations, the UHI effect would then become irrelevant from that time on as all the temps would be taken from a level playing field. Could this have already occurred as temps appear to have leveled off since 1998.

By: Sam Urbinto

Sam Urbinto — Mon, 03 Mar 2008 23:22:49 +0000

Bernie: When you go to the wunderground web site, scroll down the page after looking up a city.

All the weather stations for that city (and it looks like, suburbs around it or maybe even nearby towns) are listed there. So it’s probably the metro area. I guess. The “top 10″ is simply whatever is at the top of the list. It doesn’t seem to change.

However, you could sort the stations by name (or temp or whatever) so you’d always get the same ones, as long as they were listed. Given the variation over an area, I really didn’t concern myself with anything other than demonstrating the large variation (certainly more than .8 C !)

By: Bernie

Bernie — Mon, 03 Mar 2008 22:57:14 +0000

Sam:
When you say the top 10, “top” of what? I just want to be clear in case replication at other locations might produce something interesting.

By: Dave Dardinger

Dave Dardinger — Mon, 03 Mar 2008 21:37:55 +0000

re: #109 Sam,

Looks to be in the middle of town.

Camelback & Central is a few miles north of downtown. But Phoenix has a huge area, so it's still pretty close to downtown.

By: Sam Urbinto

Sam Urbinto — Mon, 03 Mar 2008 21:10:23 +0000

Oh, in case you didn’t know, the Solar Radiation: 0 watts/m^2 / and UV of 0 for Tokyo is because it was about 4 AM local time when I took the readings. I think only rapidfire startions have that.

As an example for Phoenix, KAZPHOEN78 is showing 88.00 watts/m^2 / and a UV index of 38, and it looks clear. Looks to be in the middle of town.

About This PWS:
Lat: N 33 ° 30 ‘ 55 ” ( 33.515 ° )
Lon: W 112 ° 4 ‘ 8 ” ( -112.069 ° )
Elevation: 1131 ft
Hardware: Davis Vantage Pro 2
Software: ALWS 1.0-beta

http://www.wunderground.com/swf/Rapid_Fire.swf?units=both&station=KAZPHOEN78

I think this is really cool stuff.

By: Sam Urbinto

Sam Urbinto — Mon, 03 Mar 2008 19:20:13 +0000

I went to the Wunderground website and looked up the two cities by name. In the case of Tokyo, there were 10 stations. So I also took the top 10 listed for Phoenix. Then I graphed them. Oh, they’re in centigrade. I took the average (I think Tokyo was 4.85) but I didn’t keep them.

For example, here’s Tokyo. It looks like the stations are updated about every 1-30 minutes.

http://www.wunderground.com/cgi-bin/findweather/getForecast?query=tokyo+japan

This is the summary for ITOKYOOH1 at Ohta-ku

Current: High: Low: Average:
Temperature: 44.2 °F / 6.8 °C 46.8 °F / 8.2 °C 44.1 °F / 6.7 °C 45.6 °F / 7.6 °C
Dew Point: 22.0 °F / -5.6 °C 23.7 °F / -4.6 °C 20.9 °F / -6.2 °C 22.1 °F / -5.5 °C
Humidity: 41% 41% 37% 39%
Wind Speed: 1.0mph / 1.6km/h / 3.0mph / 4.8km/h – 1.3mph / 2.1km/h
Wind Gust: 9.0mph / 14.5km/h / 11.0mph / 17.7km/h – -
Wind: North – - North
Pressure: 29.75in / 1007.3hPa 29.75in / 1007.3hPa 29.73in / 1006.7hPa -
Precipitation: 0.00in / 0.0mm
Solar Radiation: 0 watts/m^2 /
UV Index: 0.0 /

You can also check the every 15 minute readings for the day (and actually any day with data)and d/w/m/y stats. (For example, in 2008 so far, that station has a high of 15.4 C a low of -1.7 C and an average of 5.9 C

What that means, eh.