Saturday, October 25, 2014

Data-based perfect-deficit approach to understanding climate extremes and forest carbon assimilation capacity

Research supported by CPO’s Modeling, Analysis, Prediction, and Projections (MAPP) program was published into the May edition of Environmental Research Letters.    

Several lines of evidence suggest that the warming climate plays a vital role in driving certain types of extreme weather, yet the impact of warming and of extreme weather on forest carbon assimilation capacity is poorly known. Filling this knowledge gap is critical towards understanding the amount of carbon that forests can hold.

The researchers used a perfect-deficit approach to identify forest canopy photosynthetic capacity (CPC) deficits and analyze how they correlate to climate extremes, based on observational data measured by the eddy covariance method at 27 forest sites over 146 site-years.

They found that droughts severely affect the carbon assimilation capacities of evergreen broadleaf forest (EBF) and deciduous broadleaf forest. The carbon assimilation capacities of Mediterranean forests were highly sensitive to climate extremes, while marine forest climates tended to be insensitive to climate extremes.

The researchers' estimates suggest an average global reduction of forest CPC due to unfavorable climate extremes of 6.3 Pg C (~5.2% of global gross primary production) per growing season over 2001–2010, with EBFs contributing 52% of the total reduction.

To view the paper online, visit: http://iopscience.iop.org/1748-9326/9/6/065002.

Monday, June 23, 2014/Categories: MAPP News, General News, Climate.gov RSS

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The Climate Program Office (CPO) manages competitive research programs in which NOAA funds high-priority climate science, assessments, decision support research, outreach, education, and capacity-building activities designed to advance our understanding of Earth’s climate system, and to foster the application of this knowledge in risk management and adaptation efforts.  CPO-supported research is conducted in regions across the United States, at national and international scales, and globally.  Learn more...

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MAPP Webinar Series: Seasonal Prediction: Achievements and New Frontiers

The NOAA CPO Modeling, Analysis, Prediction, and Projections (MAPP) program hosted a webinar on the topic of Seasonal Prediction: Achievements and New Frontiers on Wednesday, October 29, 2014. The announcement is provided below; you are invited to remotely join the session.