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Title:
Integrating biogeochemistry and atmospheric chemistry into Earth system models: Where are the non-linearities?
Authors:
Holland, E. A.
Affiliation:
AA(Elisabeth A. Holland, Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, CO 80305 United States ; )
Publication:
American Geophysical Union, Fall Meeting 2004, abstract #NG31C-06
Publication Date:
12/2004
Origin:
AGU
AGU Keywords:
0315 Biosphere/atmosphere interactions, 0345 Pollution: urban and regional (0305), 0365 Troposphere: composition and chemistry, 0368 Troposphere: constituent transport and chemistry, 0400 Biogeosciences
Bibliographic Code:
2004AGUFMNG31C..06H

Abstract

The biogeochemical cycles are key regulators of the Earth System, linking terrestrial, marine, photochemical, and industrial processes. The carbon, nitroge, and sulfur cycles are integral to and affected by the climate and chemical systems. Important non-linearities are emerging as we move toward integrated Earth System models. I will show our strategy and progress toward a more fully integrated Earth System model. Explicit representation of biogeochemistry and atmospheric chemistry is an important step toward better understanding of climate-earth system interactions. Building on the existing community land model that represents leaf level exchange of energy, water and carbon dioxide, we have integrated "process-based models" of biogenic volatile organic carbon emissions, carbon and nitrogen cycling, and dry deposition of reactive C, N, , S and ozone. This provides the framework for integration of a fully coupled biogeochemical cycles, and land use change together with atmospheric chemistry. Each of the sub-models developed is undergoing careful evaluation by comparison with existing measurements taking advantage of a growing number of flux measurements throughout the globe, as well as regional biogeochemical and atmospheric chemistry studies. The credibility of the effort and the need for their utilization in assessment requires evaluation of both the sub-models and their coupled simulations. Our long-term overall goal is to examine the complex interactions of biology, climate, atmospheric chemistry and human society by including the interactions between the global reactive carbon and nitrogen cycles.
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