How not to measure temperature, part 54: Los Angeles, the city

Los AngelesPlease click the picture then continue reading.

This is the city. Los Angeles, California. I study weather stations here. I carry a thermometer. My name’s Anthony. The story you are about to see is true; the names have been changed to protect the innocent.

The day was Monday, March 24th, four days after the vernal equinox. It started out like any other day, with a bad cup of coffee and a stack of reports on scumbags you normally wouldn’t give the time of day to. But then, just as I was about to down that last gulp of coffee, a tip came in on the email hotline. It was Goetz, and his side kick Foutch.  They said there has been a heist of a weather station on the southeast side. It had been moved, and then it was dumped mysteriously on the campus of USC.

9:15AM Goetz and Foutch told me they had picked up the trail of the weather station the night before. They knew it had been bagged, and that some g-men were hopping mad about it. The g-men had written a report on the crime. In it, they claimed that because of the heist, which had been orchestrated by some other g-men at NOAA, the great City of Los Angeles had been denied it’s due: A new rainfall record year of 2004-2005. Worse than that, the temperature of the city was going down.

I’d heard about this station. It was ugly, it was dirty, it was perched on a rooftop, and it was on the wrong side of town, out by the City Department of Water and Power, just south of the Santa Ana freeway. It hung out with utility trucks and those little red street racers the punks around here drive. There was only one single photo of it. It wasn’t the kind of pristine weather station you’d take home to introduce to your mother.

10:05 AM I knew this was going to be a tough case to crack without hard as nails proof, so I decided to setup surveillance. I called in a favor from a chopper pilot named Barney that I used to share a beat with. I asked him to get aerial photos, lots of them. He asked why. I told him it was because nobody would believe that a City of Los Angeles official weather station had been on a rooftop of a parking garage and now was a shell of it’s former self sitting over at the USC campus.

I told him that when they dumped it in a cool park at USC, they killed the heart and soul of the city’s temperature record with it. And worse, they not only moved the station, but they replaced the man who had sweated and toiled on the rooftop in the hot LA smog and sun to get that weather data with one of those sissy robot contraptions. They call it an ASOS, and it has a sleek look about it, but it could never do a man’s job.

12:01 PM So Barney sets me up with the aerial surveillance from this morning. He sends the photos. I took them down to the lunch counter of the corner drugstore to develop them on my laptop. I had a cup of coffee while I did that. It cost 25 cents, and included pie.

The first aerial photo was a little fuzzy, it was hard to make out the station:

ladwp_aerialview1.jpg

Click for a live link

But I found it, and marked it with an arrow. It wasn’t a pretty sight, right in the middle of acres of blacktop and automobiles. I kept reminding myself I’d seen worse, like in Tucson, and down the street from that Ace hardware store parking lot in Lampasas, Texas. But still, it ate at me.

12:15 PM I finished the pie, and asked for refill on the coffee. The waitress looked at the first photo and just shook her head. Barney had made several passes from several angles, and he snapped one good photo of it that hit me between the eyes like the butt end of a .38 special. There it was, our beloved City of Angels Weather Station. It made me sick just to look at it. What kind of people would do something like this?

ladwp_north_aerialview

Click for larger image

But that wasn’t all, Barney got a picture from another angle out of the archives, and it showed the station even closer looking east. It was even uglier than the other photo. Just thinking about the albedo of the parking lot in the hot LA summer made my skin crawl.

ladwp_east_aerialview-520.jpg

1:05 PM Barney said he had other photos, but he couldn’t get them to me now. So he put them in a file, on something called a web server. And gave me something called a link. He said any citizen of our fair city who wanted to see the terrible place where they put the City of Angels weather station could click the link and look at the photos from all angles. Good man that Barney.

The photos were good, but not good enough. I knew that these photos would eventually be seen by Judge Rabett. Rabett has told us before that pictures don’t matter in his court, so I knew this wouldn’t be enough. I had to prove the connection to the single photo taken by the g-men for their report.

2:15 PM I had figured out a way to show that the single picture taken by the g-men in their report matched the aerial photos Barney took. To do that, I used the photo lab. The guy there is named Gimp, he walks with a limp from an old command line of fire injury. But he does good work. With Gimp’s help I was able to match the camera angle of the single land photo taken by the g-men with one of the aerial photos:

ladwp_picture_coverage-520.jpg

Click for a larger image

3:03 PM I’d finished up the aerial surveillance work of the original scene of the crime, but I still had to get photos of the place where the body of the weather station had been dumped in the park. All I had to go on was the single photo of the park taken by the g-men for their report. It sure looked like a nice cool park and final resting place. It had a little wrought iron fence around it and reminded me of a cemetery – a cemetery where the weather goes to die. It looked good, too good. I had a hunch it wasn’t as good as it looked.

3:05 PM I called up Barney, and asked about the aerial photos where they dumped the weather station; he said he had it covered. He said to check the file he left on the webserver for the street address where the park was.

3:15 PM I was running out of time, I had to get this wrapped up today. The webserver was slow, some punks were using it for a joyride. But I finally managed to open the file. and get the street address. It was out on South Vermont Avenue.

3:30 PM The aerial photos of the campus of USC where they had dumped the weather station proved my hunch was right. The picture the g-men took made it look like a perfect little park-like setting but in reality, it was just another cruddy location surrounded by acres of concrete and asphalt. The place where they dumped the station was only a few yards from the street:

usc_aerial_asos-520.jpg

Click for a live link

Source: https://www.bing.com/maps?v=2&cp=pp3hv95484k5&style=o&lvl=2&tilt=-90&dir=0&alt=-1000&scene=6986505&encType=1

The little bit of grass and the fact that it was closer to the beach made it a little cooler. The tennis courts probably didn’t help either.

Barney also left links for the close up aerial surveillance photos he’d done. When I pulled up the one looking West, it hit me. I knew why they had dumped the weather station there. There was a parking garage just across the street. It must have felt like home.

usc_aerial_north

click for a larger image

4:00 PM It was getting late, I had figured out where the original crime had occurred, and where they dumped the body of the weather station. Now all I had to do was find it’s data and I was ready to close this case.

4:15 PM I found the data in a webserver called GISTEMP. Somebody had already plotted it. Sure enough, there it was, the smoking gun. The temperature had dropped about 1.5°C when they pulled this caper in 1999. The continuity of the record had been ruined and there was now a big step function in the data that hadn’t been removed by the g-men at NCDC.

No wonder the g-men who wrote the original report were so hopping mad about it.

Since I couldn’t undo the plot, I called in Gimp again. With his help I was able to separate the time-line into red and blue segments to show where in the time-line the data had been taken from:

losangeles_giss_plot-520.png

Click to see original graph.

5:00 PM Quitting time. I had wrapped up this investigation into the sordid story of crime against temperature in the City of Angels and gotten all the documentation together to present for the court of public opinion. I’m feeling good, I’ve served the public interest. Thats’ my job. I think I’m going to go blow another quarter on pie and coffee.

9:30 AM Tuesday Foutch reports that he’s located the entire history of the station, which can be viewed here:

http://mrcc.sws.uiuc.edu/FORTS/histories/CA_Los_Angeles_Conner.pdf

The story you have just seen is true; the names were changed to protect the incompetent.

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David S
March 25, 2008 2:17 pm

Bruce
Well you’re right. The area was much more developed than I had imagined in that time frame. Good detective work on your part.

Hu McCulloch
March 25, 2008 2:19 pm

The photo just above the 4PM entry indicates that the station picks up a lot of the shade cast by the trees adjacent to it. This further confuses the significance of the reading.
BTW, here is the misleadingly bucolic shot of the corpse findsite from the JPL crime report (I hope):

March 25, 2008 2:30 pm

Here is what I dont get. When The reverend documents sites at water and power plants and complains about the warming bias, Eli rabbet and other micro climate experts ( cough cough) Say that these water treatment placements dont matter a whit. But when a station moves from one these places to another and the records cools, well JPL has a cow.
“The study found that between August 1999 and June 2006, maximum temperatures averaged 1 degree Celsius (1.8 degrees Fahrenheit) higher at the Department of Water and Power site, while the average temperatures at the new site were about a half-degree Celsius (0.9 degrees Fahrenheit) warmer. Minimum temperatures were about the same at both sites. The greatest differences in maximum temperatures occurred in late summer and early fall, with the smallest differences seen in late winter and spring. The Department of Water and Power site was cooler than USC in the spring and summer and warmer in the fall and winter. The authors attribute these seasonal differences to two factors: distance from the ocean and land use. ”
AND THEN these guys start making arguments like Pielke or Oke would!
Are JPL denialists ( ok sarcasm off)

Hu McCulloch
March 25, 2008 2:30 pm

The image I tried to link didn’t come through in this version of WordPress, but just click on the link to the JPL Crime Report (or should I have said Crime Coverup?) provided to see the deviously misleading photo of the corpse findsite.
REPLY: Here is the direct link to the image – Anthony
http://www.jpl.nasa.gov/images/earth/usc-browse.jpg

jim edwards
March 25, 2008 2:38 pm

While the rainfall bit is a little specious 250 vs. 160 MSL can mean an hour more cloud cover every day May-June.
Robert Cote,
Yes, I know the microclimate varies tremendously in Southern Calif. – I lived there for six years before moving back north. I was in La Jolla, and temps a few miles inland were very different. The farther one got from the coast, the more temperature and other weather patterns seemed to diverge from coastal patterns. Clouds would often disappear as they moved inland.[Elevation also generally increases as you drive east.]
I expect that the small variation in altitude is simply an imperfect proxy for distance from the coast. Whether differences in microclimate between the two measurement sites exists at all, or are attributable to distance from the coast [noted in the JPL article], proximity to mountain ranges, or UHI effects – I have no idea.
Scientists at JPL should know better than to publicly attribute more than about 0.02 degree F change to a NINETY foot altitude difference, however. [The new, lower site should be hotter, BTW, if elevation is relevant] Clouds at the old site shouldn’t be cooled enough by a 90 ft elev increase
alone to significantly increase rainfall.

old construction worker
March 25, 2008 3:20 pm

LOL great post Thanks
McGrats,
Here’s an report you may not know about.
“Three elements are necessary for governments to make rational policies in response to climate change: Scientists must accurately predict (1) global temperature changes, (2) the effects of any temperature changes and (3) the effects of feasible alternative policy responses. To justify policy changes, governments need scientific forecasts for all three forecasting problems and they need those forecasts to show net benefits flowing from proposed policies. If governments implement policy changes without such justification, they are likely to cause harm.”
http://www.ncpa.org/pub/st/st308

bill p
March 25, 2008 3:34 pm

“I had a cup of coffee while I did that. It cost 25 cents, and included pie.”
Now, this just can’t be true.
REPLY: In the 50’s when Dragnet first aired, it was. I just wanted to be true to historical form in a lighthearted way.

March 25, 2008 3:44 pm

To Old Construction Worker:
Interesting article. Unfortunately, certain governmental bodies are inclined to consider it irrelevant and instead, grovel to their fringe constituency.
Regardless, I firmly believe the tide is shifting in the favor of the skeptics and truth is the reason, not global warming !

Bruce Foutch
March 25, 2008 4:43 pm

For your reading pleasure from the Journal of Applied Meteorology:
Urban Influences on Surface Temperatures in the Southwestern United States during Recent Decades – Daniel R. Cayan, Scripts Institute of Oceanography, 1984″
From the conclusion section:
“This urban increase poses severe problems om using these stations as indicators of climate variability”
…and my vote for best quote of the day goes to:
“Use of these city stations for verifying temperature forecasts is simply invalid…”

Evan Jones
Editor
March 25, 2008 5:30 pm

“I had a cup of coffee while I did that. It cost 25 cents, and included pie.”
Now, this just can’t be true.
REPLY: In the 50’s when Dragnet first aired, it was. I just wanted to be true to historical form in a lighthearted way.
Ah, the Good Old Days. When coffee and cake cost a quarter. And no one had a quarter to spare!
I remember well that glorious day back arouind 1964 when my allowance went up to a quarter a week. (Wealth unlimited!)

Evan Jones
Editor
March 25, 2008 5:33 pm

BTW, that was a good tip to check out Atmoz. I urge all present to do so.
Two interesting facts merge:
1.) TOBS is the biggest adjustment made by the USHCN.
2.) TOBS adjustments are being applied even when the there ain’t no change in time of observation!

Evan Jones
Editor
March 25, 2008 7:16 pm

Hey, Rev!
Did you know you’ve got a write-up in Wikipedia? It’s not a hatchet job, either.
Check it out!
http://en.wikipedia.org/wiki/Anthony_Watts

Editor
March 25, 2008 7:27 pm

And an intoxicated TCO seems to be hijacking Atmoz’s blog (a shame). Now that is Total Cost of Ownership.

March 25, 2008 8:55 pm

Interesting. The integrity of the data is seriously questionable if used in a time series type of analysis. Anyway, like the creative element of this post.

Rod Smith
March 26, 2008 8:14 am

A very cleverly written article Anthony, but why didn’t you run it on a “Friday?”
I can’t help myself!!

mccall
March 26, 2008 10:24 am

Are both station classifications, LA (1999) class 5’s … doesn’t look like it?
REPLY: The parking garage location would be a 5 while the USC location would be a 4.

Evan Jones
Editor
March 26, 2008 3:31 pm

The parking garage location would be a 5 while the USC location would be a 4.
And that more or less matches the change in temp and ithus conforms with the CRN rating system. (I can almost hear the screams from a certain other blog which shall remain nameless.)

Evan Jones
Editor
March 26, 2008 7:12 pm

I mean, like, it’s bad enough that these stations are homogenized. But why do they usually turn out to be pasteurized?

VG
March 27, 2008 12:28 am

Re NPR: me angry sorry immediate reaction remove if inappropriate here or put somewhere appropriate
Concerning you story about Antarctica ice today
I find it amazing that you have not checked the facts
from IPCC sites
University of Illinois
http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/current.365.south.jpg
Antarctic ice ABOVE normal for past 6 Months and growing dramatically
Sea Ice Index (type in search) SH ice 35% ABOVE 2008
World mean global temperatures DECLINING since 2004 Hadcrut Hadley decline very marked recently
http://www.cru.uea.ac.uk/cru/climon/data/themi/g17.htm
To date declines again very marked Univ Alabama
http://discover.itsc.uah.edu/amsutemps/
pick your atmospheric height
Also there is intense volcnic activity underwater in that area
so increasing ice in SH + warm waters underneath = ice cracks off and melts?
http://www.sciencedaily.com/releases/2008/01/080120160720.htm

March 27, 2008 5:28 am

Anthony,, Mike C reports that NCDC has removed the observer data again from the online system. have a look.
spotted on ATMOZ
REPLY: No, just moved to the location tab, part of an upgrade and just makes better sense there.

March 27, 2008 6:44 am

Ok I’ll correct the record over at ATMOZ

kelly
March 28, 2008 7:14 am

Great tale, I could almost see Steve Martin feeling up Racheal Ward in ” Dead men Don’t Wear Plaid.
Has a Nobel prize/ academy award ever been revoked? …………the shame

DrD
March 28, 2008 8:13 am

It’s a setup I tell you, a dirty, lousy frame. You dirty rat, I’m gonna get you, for what you did, to my weather station!

cv
March 31, 2008 9:07 pm

Great work, a little info for you on the USC site. My family and at least four other groups use that little area for tailgating during football season. The building across the street is a post office with roof parking The station is well fenced and appears to be well maintained with nice shade trees. The street next to the station is Vermont Blvd, a main bus route in that part of town.

April 18, 2008 5:07 pm

Thanks..