DOI: 10.1175/JCLI-D-15-0482.1
Scopus记录号: 2-s2.0-84971408136
论文题名: The vertical structure of tropospheric water vapor: Comparing radiative and ocean-driven climate changes
作者: Rose B.E.J. ; Rencurrel M.C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 11 起始页码: 4251
结束页码: 4268
语种: 英语
Scopus关键词: Atmospheric temperature
; Carbon dioxide
; Climate models
; Oceanography
; Surface properties
; Surface waters
; Water vapor
; Diagnostic techniques
; Different time scale
; Heat budgets/fluxes
; Integrated water vapors
; Ocean heat transport
; Sea surface temperature (SST)
; Transient climate change
; Tropical temperatures
; Climate change
; atmospheric structure
; climate change
; climate modeling
; heat budget
; heat flux
; nonlinearity
; radiative forcing
; relative humidity
; sea surface temperature
; timescale
; troposphere
; warming
; water vapor
英文摘要: Changes in column-integrated water vapor (Q) in response to increased CO2 and ocean heat uptake (OHU) are investigated in slab-ocean aquaplanet simulations. The simulations span a wide range of warming and moistening patterns due to the spatial structures of the imposed OHU. Fractional changes in Q per degree of surface warming range from 0% to 20% K-1 locally and from 3.6% to 11% K-1 globally. A new diagnostic technique decomposes these changes into relative humidity (RH), surface temperature, and lapse rate contributions. Single-column calculations demonstrate substantial departures from apparent (surface temperature based) Clausius-Clapeyron (CC) scaling due to lapse rates changes; a moist-adiabatic column with fixed, uniform RH exceeds the CC rate by 2.5% K-1. The RH contribution is very small in most simulations. The various Q scalings are thus all consistent CC, but result from different patterns of polar amplification and lapse rate change. Lapse rates are sensitive to location and magnitude of OHU, with implications for Q under transient climate change. CO2 with subpolar (tropical) OHU results in higher (lower) Q scalings than CO2 alone. The weakest Q scaling (and largest RH effects) is found for increased poleward ocean heat transport, which causes strongly polar-amplified warming and near-zero tropical temperature change. Despite weak RH changes and fidelity to the CC relation, Q is expected to vary widely on different time scales in nature due to sensitivity of lapse rates to OHU along with the nonlinearity of the diagnostics. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49939
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States
Recommended Citation:
Rose B.E.J.,Rencurrel M.C.. The vertical structure of tropospheric water vapor: Comparing radiative and ocean-driven climate changes[J]. Journal of Climate,2016-01-01,29(11)