How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties

J. R. Dim; H. Murakami; T. Takamura; M. Hori; T. Y. Nakajima

doi:10.1109/IGARSS.2009.5417673

How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties

J. R. Dim, H. Murakami, T. Takamura, M. Hori, T. Y. Nakajima

Earth System Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The Proper depiction of water vapor distribution in the upper troposphere and the related radiative properties is critical for the accuracy of climate and atmospheric circulation model predictions. In the present study, differences between satellite observations (Terra-MODIS) and atmospheric models' simulations are examined. The models are: the National Center for Environmental Protection/Department Of Energy (NCEP-DOE) reanalysis-2 data and the Nonhydrostatic ICosahedral Atmospheric Model (NICAM). The models' outputs (atmospheric temperature and humidity profiles) are used in this study to simulate the upper tropospheric brightness temperature (UTBT) and relative humidity (UTRH) at clear sky and low cloud areas. The results obtained show the contribution of atmospheric instability due to heat movements of the lower troposphere clear sky, cloud convection and low cloud radiative properties in the discrepancies between model and observation results. These differences tend to increase with the increase of the proportion of unstable pixels in the clear sky areas. Heat movements from cloud convection and low clouds examined through the convective clouds' distribution and the cloud effective emissivity respectively, show that cloud convection mostly affects the NICAM model results (existence of a positive correlation between the latter model error and the amount of convective clouds) and, discrepancies are stronger in broken clouds than continuous clouds.

Original language	English
Title of host publication	2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings
Pages	V292-V295
DOIs	https://doi.org/10.1109/IGARSS.2009.5417673
State	Published - 2009
Event	2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Cape Town, South Africa Duration: 2009/07/12 → 2009/07/17

Publication series

Name	International Geoscience and Remote Sensing Symposium (IGARSS)
Volume	5

Conference

Conference	2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009
Country/Territory	South Africa
City	Cape Town
Period	2009/07/12 → 2009/07/17

Keywords

Models
Satellite
Simulation
Water vapor

ASJC Scopus subject areas

Computer Science Applications
General Earth and Planetary Sciences

Access to Document

10.1109/IGARSS.2009.5417673

Cite this

Dim, J. R., Murakami, H., Takamura, T., Hori, M., & Nakajima, T. Y. (2009). How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties. In 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings (pp. V292-V295). Article 5417673 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 5). https://doi.org/10.1109/IGARSS.2009.5417673

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title = "How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties",

abstract = "The Proper depiction of water vapor distribution in the upper troposphere and the related radiative properties is critical for the accuracy of climate and atmospheric circulation model predictions. In the present study, differences between satellite observations (Terra-MODIS) and atmospheric models' simulations are examined. The models are: the National Center for Environmental Protection/Department Of Energy (NCEP-DOE) reanalysis-2 data and the Nonhydrostatic ICosahedral Atmospheric Model (NICAM). The models' outputs (atmospheric temperature and humidity profiles) are used in this study to simulate the upper tropospheric brightness temperature (UTBT) and relative humidity (UTRH) at clear sky and low cloud areas. The results obtained show the contribution of atmospheric instability due to heat movements of the lower troposphere clear sky, cloud convection and low cloud radiative properties in the discrepancies between model and observation results. These differences tend to increase with the increase of the proportion of unstable pixels in the clear sky areas. Heat movements from cloud convection and low clouds examined through the convective clouds' distribution and the cloud effective emissivity respectively, show that cloud convection mostly affects the NICAM model results (existence of a positive correlation between the latter model error and the amount of convective clouds) and, discrepancies are stronger in broken clouds than continuous clouds.",

keywords = "Models, Satellite, Simulation, Water vapor",

author = "Dim, {J. R.} and H. Murakami and T. Takamura and M. Hori and Nakajima, {T. Y.}",

year = "2009",

doi = "10.1109/IGARSS.2009.5417673",

language = "英語",

isbn = "9781424433957",

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pages = "V292--V295",

booktitle = "2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings",

note = "2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 ; Conference date: 12-07-2009 Through 17-07-2009",

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Dim, JR, Murakami, H, Takamura, T, Hori, M & Nakajima, TY 2009, How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties. in 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings., 5417673, International Geoscience and Remote Sensing Symposium (IGARSS), vol. 5, pp. V292-V295, 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009, Cape Town, South Africa, 2009/07/12. https://doi.org/10.1109/IGARSS.2009.5417673

How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties. / Dim, J. R.; Murakami, H.; Takamura, T. et al.
2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings. 2009. p. V292-V295 5417673 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties

AU - Dim, J. R.

AU - Murakami, H.

AU - Takamura, T.

AU - Hori, M.

AU - Nakajima, T. Y.

PY - 2009

Y1 - 2009

N2 - The Proper depiction of water vapor distribution in the upper troposphere and the related radiative properties is critical for the accuracy of climate and atmospheric circulation model predictions. In the present study, differences between satellite observations (Terra-MODIS) and atmospheric models' simulations are examined. The models are: the National Center for Environmental Protection/Department Of Energy (NCEP-DOE) reanalysis-2 data and the Nonhydrostatic ICosahedral Atmospheric Model (NICAM). The models' outputs (atmospheric temperature and humidity profiles) are used in this study to simulate the upper tropospheric brightness temperature (UTBT) and relative humidity (UTRH) at clear sky and low cloud areas. The results obtained show the contribution of atmospheric instability due to heat movements of the lower troposphere clear sky, cloud convection and low cloud radiative properties in the discrepancies between model and observation results. These differences tend to increase with the increase of the proportion of unstable pixels in the clear sky areas. Heat movements from cloud convection and low clouds examined through the convective clouds' distribution and the cloud effective emissivity respectively, show that cloud convection mostly affects the NICAM model results (existence of a positive correlation between the latter model error and the amount of convective clouds) and, discrepancies are stronger in broken clouds than continuous clouds.

AB - The Proper depiction of water vapor distribution in the upper troposphere and the related radiative properties is critical for the accuracy of climate and atmospheric circulation model predictions. In the present study, differences between satellite observations (Terra-MODIS) and atmospheric models' simulations are examined. The models are: the National Center for Environmental Protection/Department Of Energy (NCEP-DOE) reanalysis-2 data and the Nonhydrostatic ICosahedral Atmospheric Model (NICAM). The models' outputs (atmospheric temperature and humidity profiles) are used in this study to simulate the upper tropospheric brightness temperature (UTBT) and relative humidity (UTRH) at clear sky and low cloud areas. The results obtained show the contribution of atmospheric instability due to heat movements of the lower troposphere clear sky, cloud convection and low cloud radiative properties in the discrepancies between model and observation results. These differences tend to increase with the increase of the proportion of unstable pixels in the clear sky areas. Heat movements from cloud convection and low clouds examined through the convective clouds' distribution and the cloud effective emissivity respectively, show that cloud convection mostly affects the NICAM model results (existence of a positive correlation between the latter model error and the amount of convective clouds) and, discrepancies are stronger in broken clouds than continuous clouds.

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M3 - 会議への寄与

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SN - 9781424433957

T3 - International Geoscience and Remote Sensing Symposium (IGARSS)

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BT - 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings

T2 - 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009

Y2 - 12 July 2009 through 17 July 2009

ER -

Dim JR, Murakami H, Takamura T, Hori M, Nakajima TY. How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties. In 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings. 2009. p. V292-V295. 5417673. (International Geoscience and Remote Sensing Symposium (IGARSS)). doi: 10.1109/IGARSS.2009.5417673

How atmospheric instability influences models results of satellite observed upper tropospheric water vapor properties

Abstract

Publication series

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Keywords

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