Climate Blog and News Recap: 2010 08 20
Lots of blog talk on McShane and Wyner:
A statistical analysis of multiple temperature proxies: are reconstructions of surface temperatures reliable?
the Air Vent: MW10 – Some thoughts
Climate Audit: McShane and Wyner 2010
William M. Briggs: The McShane and Wyner Gordie Howe Treatment Of Mann
Deep Climate: McShane and Wyner 2010
Deltoid: A new Hockey Stick: McShane and Wyner 2010
Rabett Run: A Flat New Puzzler
Klimazweibal: McShane and Wyner on climate reconstruction methods
Jiping Liu and Judith Curry have a paper picked up by WUWT
Accelerated Warming of the Southern Ocean and Its Impacts on the Hydrological Cycle and Sea Ice
Geologists Revisit Earth’s Great Oxygenation Event: More Like the ‘Great Redox Evolution’
Redox proxies, such as the ratio of chromium isotopes in banded iron formations or the ratio of isotopes in sulfide particles trapped in diamonds, tell geologists indirectly whether the Earth’ s atmosphere and oceans were reducing (inclined to give away electrons to other atoms) or oxidizing (inclined to glom onto them). …
…In the July issue of Nature Geoscience, Washington University in St. Louis geochemist David Fike gives an unusually candid account of the difficulties his community faces in correctly interpreting redox proxies, issuing a call for denser sampling and more judicious reading of rock samples
Too Hot to Handle: Impacts of Climate Change on Mussels
Climate change is causing higher air and water temperatures along the east coast of the United States. These changes have shrunk the geographic region where blue mussels are able to survive, according to findings by University of South Carolina researchers published in the Journal of Biogeography.
New Computer Model Advances Climate Change Research
Scientists can now study climate change in far more detail with powerful new computer software released by the National Center for Atmospheric Research (NCAR).
The Community Earth System Model (CESM) will be one of the primary climate models used for the next assessment by the Intergovernmental Panel on Climate Change (IPCC). The CESM is the latest in a series of NCAR-based global models developed over the last 30 years. The models are jointly supported by the Department of Energy (DOE) and the National Science Foundation, which is NCAR’s sponsor
New Satellite Data Reveals True Decline of World’s Mangrove Forests
New satellite imagery has given scientists the most comprehensive and exact data on the distribution and decline of mangrove forests from across the world. The research, carried out by scientists from the U.S Geological Survey and NASA, is published in Global Ecology and Biogeography, and reveals forest distribution is 12.3% smaller than earlier estimates.
Human Activity Eclipses Brazos River’s Native Carbon Cycle
A new study by geochemists at Rice University finds that damming and other human activity has completely obscured the natural carbon dioxide cycle in Texas’ longest river, the Brazos.
“The natural factors that influence carbon dioxide cycling in the Brazos are fairly obvious, and we expected the radiocarbon signature of the river to reflect those influences,” said study co-author Caroline Masiello, assistant professor of Earth science at Rice. “But it looks like whatever the natural process was in the Brazos, in terms of sources and sinks of carbon dioxide, it has been completely overprinted by human activities.”
Warmest Year-to-Date Global Temperature on Record
The combined global land and ocean surface temperature made this July the second warmest on record, behind 1998, and the warmest averaged January-July on record. The global average land surface temperature for July and January-July was warmest on record. The global ocean surface temperature for July was the fifth warmest, and for January-July 2010 was the second warmest on record, behind 1998.
Measuring Salt Shine to Improve Climate Understanding
From 14 — 25 August 2010, scientists from around the world will gather in Southern Turkey to measure the spectral reflectance of a few square kilometres of salt. These measurements will have a major impact on the future of satellite based Earth observation, and will ultimately improve our understanding of the Earth’s climate…
…Tuz Gölü is one of eight sites recently endorsed by the Committee on Earth Observation Satellites (CEOS) to become an international reference standard to evaluate satellites’ sensor-to-sensor biases, and also to calibrate/validate their radiometric performance.
Massive Coral Mortality Following Bleaching in Indonesia
The Wildlife Conservation Society has released initial field observations that indicate that a dramatic rise in the surface temperature in Indonesian waters has resulted in a large-scale bleaching event that has devastated coral populations.
Resolving the Paradox of the Antarctic Sea Ice
While Arctic sea ice has been diminishing in recent decades, the Antarctic sea ice extent has been increasing slightly. Researchers from the Georgia Institute of Technology provide an explanation for the seeming paradox of increasing Antarctic sea ice in a warming climate. …
…However, the climate models predict greenhouse gases will continue to increase in the 21st century, which will result in the sea ice melting at a faster rate from both above and below. Here’s how it works. Increased warming of the atmosphere is expected to heat the upper ocean, which will increase the melting of the sea ice from below. In addition, increased warming will also result in a reduced level of snowfall, but more rain. Because rain doesn’t reflect heat back the way snow does, this will enhance the melting of the Antarctic sea ice from above.
Climate Change Affects Geographical Range of Plants, Study Finds
Researches at the University of Gothenburg have shown how climate change many million years ago has influenced the geographical range of plants by modelling climate preferences for extinct species. The method can also be used to predict what effects climate change of today and tomorrow will have on future distributions of plants and animals.
Extended Solar Minimum Linked to Changes in Sun’s Conveyor Belt
A new analysis of the unusually long solar cycle that ended in 2008 suggests that one reason for the long cycle could be a stretching of the Sun’s conveyor belt, a current of plasma that circulates between the Sun’s equator and its poles. The results should help scientists better understand the factors controlling the timing of solar cycles and could lead to better predictions.