当前位置： 首页»科学研究» 科研动态 【09.12讲座】THE GLOBAL ENERGY BALANCE FROM A SURFACE PERSPECTIVE 发布时间：Tue Sep 06 17:08:00 CST 2016

主  题：THE GLOBAL ENERGY BALANCE FROM A SURFACE PERSPECTIVE

主讲人：Martin Wild

时  间：2016年09月12 日(星期一) 10:00-12:00

地  点：京师科技大厦B座520会议室

讲座内容介绍：

        Despite its central importance for climate, substantial uncertainties still exist in the quantification of the components of the Global Energy Balance, and their representation in climate models. While the radiative exchanges at the top-of-atmosphere are now well known from satellite programs, a challenge remains the energy distribution within the climate system, which cannot be directly measured from satellites. This is reflected in greatly diverging estimates of the surface energy balance that have been published over the years and simulated by climate models. Since the mid-1990s, accurate measurements become increasingly available from the surface radiation networks, and satellite-derived products of surface fluxes improved, which allow to better constrain the energy fluxes at the Earth’s surface. As a consequence, recent independent global estimates of the surface radiation components inferred from surface and satellite observations have converged to within a few Wm-2. Thus there is increasing confidence not only in the estimates of the global radiation budgets at the top-of-atmosphere, but also at the surface.

Discussed is further the increasing evidence that surface radiative fluxes undergo significant changes on decadal timescales, not only in the longwave as expected from the increasing greenhouse effect, but also in surface shortwave radiation, known as “dimming” and “brightening”.

主讲人简介:

Martin Wild is active in the field of radiation and energy balance, working with both observations and climate models, as documented in 160 peer-reviewed publications and three IPCC reports. His major research interests are related to the role of radiation in the climate system, particularly in the energy and water cycles. Numerous of his publications focus on the representation of radiation and surface energy balance in climate models. He is also particularly interested in the temporal variation of the surface radiation and energy balance components. A major issue is thereby the observed decrease of surface solar radiation up to the 1980s (“global dimming”) and its partial recovery thereafter (“brightening”), and related implications for climate change, ecosystems and solar power generation. Martin Wild chairs the working group “Global Energy Balance” of the International Radiation Commission (IRC), and is Editor of the Journal of Geophysical Research (JGR) and Earth System Dynamics (ESD). He has been a lead author of the latest (5th) assessment report of the Intergovernmental Panel on Climate Change (IPCC) and in charge of the section on “changes in radiation”. He is also regularly convening related sessions at the annual European Geosciences Union (EGU) and American Geophysical Union (AGU) Assemblies, at the International Radiation Symposium (IRS) and the International Union of Geodesy and Geophysics (IUGG).

相关附件：