From Philip Gentry at UAH April temperatures (preliminary)
Global composite temp.: +0.19 C (about 0.34 degrees Fahrenheit) above 30-year average for April.
Global climate trend since Nov. 16, 1978: +0.14 C per decade
Northern Hemisphere: +0.36 C (about 0.65 degrees Fahrenheit) above 30-year average for April.
Southern Hemisphere: +0.02 C (about 0.04 degrees Fahrenheit) above 30-year average for April.
Tropics: +0.09 C (about 0.16 degrees Fahrenheit) above 30-year average for April.
March temperatures (revised):
Global Composite: +0.17 C above 30-year average
Northern Hemisphere: +0.34 C above 30-year average
Southern Hemisphere: ±0.00 C at 30-year average
Tropics: ±0.00 C at 30-year average
(All temperature anomalies are based on a 30-year average (1981-2010) for the month reported.)
Notes on data released May 6, 2014:
Compared to seasonal norms, the coldest place in Earth’s atmosphere in April was over the western Antarctic by the Ross Ice Shelf, where temperatures were as much as 3.32 C (about 6.0 degrees Fahrenheit) cooler than seasonal norms, according to Dr. John Christy, a professor of atmospheric science and director of the Earth System Science Center at The University of Alabama in Huntsville. Compared to seasonal norms, the warmest departure from average in April was in southeastern Russia near the town of Chita. Temperatures there were as much as 5.69 C (about 10.3 degrees Fahrenheit) warmer than seasonal norms.
Archived color maps of local temperature anomalies are available on-line at:
As part of an ongoing joint project between UAHuntsville, NOAA and NASA, Christy and Dr. Roy Spencer, an ESSC principal scientist, use data gathered by advanced microwave sounding units on NOAA and NASA satellites to get accurate temperature readings for almost all regions of the Earth. This includes remote desert, ocean and rain forest areas where reliable climate data are not otherwise available.
The satellite-based instruments measure the temperature of the atmosphere from the surface up to an altitude of about eight kilometers above sea level. Once the monthly temperature data is collected and processed, it is placed in a “public” computer file for immediate access by atmospheric scientists in the U.S. and abroad.
Neither Christy nor Spencer receives any research support or funding from oil, coal or industrial companies or organizations, or from any private or special interest groups. All of their climate research funding comes from federal and state grants or contracts.
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Brian says:
May 7, 2014 at 1:01 pm
Christopher Monckton, would you “do that thing” where you start with the current temperature, and calculate backwards as far as you can go while the slope remains zero?
I am obviously not Lord Monckton, but you can easily do this on your own using:
http://moyhu.blogspot.com.au/p/temperature-trend-viewer.html?Xxdat=%5B0,1,4,48,92%5D
If you want UAH version 5.6, click UAH.
Click the blue ball to the right until the blue ball is at April 2014.
Click until the red ball is at August 2008.
The slope is negative.
But at July the slope is positive.
So the slope is assumed to be 0 from August.
Note that the April number may not be up yet. As well, when a new number comes in, go by the last month you have such as August 2008 and depending on whether the new point is above or below the zero trend line, use trial and error month by month to get the new time for a slope that is at least slightly negative.
Thanks for the news, I’ll be updating my article on the UAH Global Temperature Report.
You can download the figures from the dataset and work out the trends for yourself.
Including April’s data, the trend is -0.019 deg C / decade since August 2008, and positive since all dates earlier than that.
Werner – thank you!
Brian
Steven Mosher says:May 6, 2014 at 1:02 pm
“you are mistaking ANOMALIES for temperature. dont do that. Next, these are temperature anomalies for the atmosphere 8 km UP. not the surface!”
So, Steven, What are the temperatures 8 km up? That would be above 24,000 feet.
from the Aviation Weather Center:http://www.aviationweather.gov/products/nws/info
Sample winds aloft text message:
DATA BASED ON 010000Z
VALID 010600Z FOR USE 0500-0900Z. TEMPS NEG ABV 24000
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
MKC 2426 2726-09 2826-14 2930-21 2744-32 2751-41 275550 276050 276547
I would point out: TEMPS NEG ABV 24000. translation: Temps negative above 24,000 ft.
@24,000 ft the temp is -41 C.
Global Composite: +0.17 C above 30-year average
So the Temp adjusted (love that word) up by 0.17 is (drum roll) -40.83 C. I feel warmer already.
This is the problem with using anomalies instead of real temperatures. No Context.
Bob Tisdale May 6, 2014 at 4:05 pm.
“The PDO has been positive for the 1st 3 months of 2014.”
So, is the PDO still in its negative phase? Or can we expect the pre-’99 warming to resume?
“[PDO] shifts phases on at least inter-decadal time scale, usually about 20 to 30 years.”
“.. the phases are not set in stone; there are frequently short sets of 1-5 warm years during a cool phase and vice-versa.”
http://www1.ncdc.noaa.gov/pub/data/cmb/teleconnections/pdo-5-pg.gif
NOAA:
The negative PDO index has persisted near 4 years (47 months) since May 2010, and weakened significantly in Mar 2014 with PDO index =-0.02.
Brother Don J: “Each of the two PDO warm periods (1915-1945 and 1978-1998) and the three cool periods (1880-1915, 1945-1977, 1999-2014) lasted 25-30 years. If the flip of the PDO into its cool mode in 1999 persists, the global climate should cool for the next several decades. “
I recall some website that shows the temperature readings from each of the commonly-used global indexes: Hadcrut4, GISS, NCDC and draws a graph for you with a trend line for the time period you select. But I can’t find it. Does anyone have the link?
Thanks
James McCown says:
May 8, 2014 at 7:17 am
This?
http://www.woodfortrees.org/plot
Yes, thank you so much, Werner.