The global temperature has fallen .653°C (from +0.554 in March 2010 to -0.099 in March 2011) in just one year. That’s a magnitude nearly equivalent to the agreed upon global warming signal agreed upon by the IPCC. It is quite a sharp drop.

According to the 2007 Fourth Assessment Report by the Intergovernmental Panel on Climate Change (IPCC), global surface temperature increased by 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the 20th century

Comments from Dr. Roy Spencer: (plus graph)

(Graph by Anthony Watts, data and commentary from Dr. Spencer/UAH)

UAH Temperature Update for March, 2011: Cooler Still -0.10 deg. C

La Nina Coolness Persists

The global average lower tropospheric temperature anomaly for March 2011 fell to -0.10 deg. C, with cooling in both the Northern and Southern Hemispheric extratropics, while the tropics stayed about the same as last month. (I’m on the road in Virgina, so the temperature graph will not be updated until I return on Thursday.)

April 5th, 2011

YR MON GLOBAL NH SH TROPICS

2010 01 0.542 0.675 0.410 0.635

2010 02 0.510 0.553 0.466 0.759

2010 03 0.554 0.665 0.443 0.721

2010 04 0.400 0.606 0.193 0.633

2010 05 0.454 0.642 0.265 0.706

2010 06 0.385 0.482 0.287 0.485

2010 07 0.419 0.558 0.280 0.370

2010 08 0.441 0.579 0.304 0.321

2010 09 0.477 0.410 0.545 0.237

2010 10 0.306 0.257 0.356 0.106

2010 11 0.273 0.372 0.173 -0.117

2010 12 0.181 0.217 0.145 -0.222

2011 01 -0.010 -0.055 0.036 -0.372

2011 02 -0.020 -0.042 0.002 -0.348

2011 03 -0.099 -0.073 -0.126 -0.345

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