Observed changes in surface atmospheric energy over land

被引:35
作者
Peterson, Thomas C. [1 ]
Willett, Katharine M. [3 ]
Thorne, Peter W. [1 ,2 ]
机构
[1] NOAA, Natl Climat Data Ctr, Asheville, NC 28801 USA
[2] N Carolina State Univ, Cooperat Inst Climate & Satellites, Asheville, NC 28801 USA
[3] Hadley Ctr, Met Off, Exeter EX1 3PB, Devon, England
关键词
TEMPERATURE; HEAT;
D O I
10.1029/2011GL048442
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The temperature of the surface atmosphere over land has been rising during recent decades. But surface temperature, or, more accurately, enthalpy which can be calculated from temperature, is only one component of the energy content of the surface atmosphere. The other parts include kinetic energy and latent heat. It has been advocated in certain quarters that ignoring additional terms somehow calls into question global surface temperature analyses. Examination of all three of these components of atmospheric energetics reveals a significant increase in global surface atmospheric energy since the 1970s. Kinetic energy has decreased but by over two orders of magnitude less than the increases in both enthalpy and latent heat which provide approximately equal contributions to the global increases in heat content. Regionally, the enthalpy or the latent heat component can dominate the change in heat content. Although generally changes in latent heat and enthalpy act in concert, in some regions they can have the opposite signs. Citation: Peterson, T. C., K. M. Willett, and P. W. Thorne (2011), Observed changes in surface atmospheric energy over land, Geophys. Res. Lett., 38, L16707, doi:10.1029/2011GL048442.
引用
收藏
页数:6
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