The Week That Was: May 9, 2015 Brought to You by www.SEPP.org
By Ken Haapala, President, Science and Environmental Policy Project
Controversial Points: On her web site, Climate Etc., Judith Curry explores what she considers the most controversial points in climate science. The points must be agreed upon in order to resolve the controversies. To her, the two general issues are: 1) whether the warming since 1950 has been dominated by human causes and 2) how much the planet will warm in the 21st century?
From these general issues she develops the specific technical issues that need to be resolved, including:
- “Causes of the 1900-1940 warming; the cooling from 1940-1976; and the recent hiatus in warming since 1998. How are these explained in context of AGW being the dominant influence since 1950?
- Solar impacts on climate (including indirect effects). What are the magnitudes and nature of the range of physical mechanisms?
- Nature and mechanisms of multi-decadal and century scale natural internal variability. How do these modes of internal variability interact with external forcing, and to what extent are these modes separable from externally forced climate change?
- Deep ocean heat content variations and mechanisms of vertical heat transfer between the surface and deep-ocean.
- Sensitivity of the climate system to external forcing, including fast thermodynamic feedbacks (water vapor, clouds, lapse rate).
- Climate dynamics of clouds: Could changes in cloud distribution or optical properties contribute to the global surface temperature hiatus? How do cloud patterns (and TOA and surface radiative fluxes) change with shifts in atmospheric circulation and teleconnection regimes (e.g. AO, NAO, PDO)? How do feedbacks between clouds, surface temperature, and atmospheric thermodynamics/circulations interact with global warming and the atmospheric circulation and teleconnection regimes?”