| DOI: | 10.1175/JCLI-D-11-00552.1
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| Scopus记录号: | 2-s2.0-84867669778
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| 论文题名: | Climate model-simulated diurnal cycles in HIRS clear-sky brightness temperatures |
| 作者: | MacKenzie I.A.; Tett S.F.B.; Lindfors A.V.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2012
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| 卷: | 25, 期:17 | | 起始页码: | 5845
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| 结束页码: | 5863
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| 语种: | 英语
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| Scopus关键词: | Brightness temperature measurement
; Brightness temperatures
; Climate trends
; Diurnal cycle
; Diurnal effects
; Diurnal variability
; Full model
; High resolution
; Long-wave radiation
; Model evaluation
; Model performance
; Radiative transfer codes
; Satellite observations
; Sea surface temperature (SST)
; Tropospheric temperature
; Water vapor channels
; Atmospheric humidity
; Climate models
; Climatology
; Infrared radiation
; Radiation effects
; Radiative transfer
; Temperature
; Temperature measurement
; Troposphere
; Vapors
; Computer simulation
; air temperature
; brightness temperature
; clear sky
; climate modeling
; climatology
; diurnal variation
; infrared radiation
; longwave radiation
; radiative transfer
; sea surface temperature
; troposphere
; water vapor
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| 英文摘要: | Clear-sky brightness temperature measurements from the High-Resolution Infrared Radiation Sounder (HIRS) are simulated with two climate models via a radiative transfer code. The models are sampled along the HIRS orbit paths to derive diurnal climatologies of simulated brightness temperature analogous to an existing climatology based on HIRS observations. Simulated and observed climatologies are compared to assess model performance and the robustness of the observed climatology. Over land, there is good agreement between simulations and observations, with particularly high consistency for the tropospheric temperature channels. Diurnal cycles in the middle- and upper-tropospheric water vapor channels are weak in both simulations and observations, but the simulated diurnal brightness temperature ranges are smaller than are observed with different phase and there are also intermodel differences. Over sea, the absence of diurnal variability in the models' sea surface temperatures causes an underestimate of the small diurnal cycles measured in the troposphere. The simulated and observed climatologies imply similar diurnal sampling biases in the HIRS record for the tropospheric temperature channels, but for the upper-tropospheric water vapor channel, differences in the contributions of the 24- and 12-hourly diurnal harmonics lead to differences in the implied bias. Comparison of diurnal cycles derived fromHIRS-like and full model sampling suggests that the HIRS measurements are sufficient to fully constrain the diurnal behavior. Overall, the results suggest that recent climate models well represent the major processes driving the diurnal behavior of clear-sky brightness temperature in the HIRS channels. This encourages further studies of observed and simulated climate trends over the HIRS era. © 2012 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/52252
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | The University of Edinburgh, Edinburgh, United Kingdom; Finnish Meteorological Institute, Helsinki, Finland
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| Recommended Citation: | |
MacKenzie I.A.,Tett S.F.B.,Lindfors A.V.. Climate model-simulated diurnal cycles in HIRS clear-sky brightness temperatures[J]. Journal of Climate,2012-01-01,25(17)
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