Month-long simulations of gravity waves over North America and North Atlantic in comparison with satellite observations

Fuqing Zhang, Meng Zhang, Junhong Wei, Shuguang Wang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Mesoscale simulations of gravity waves in the upper troposphere and lower stratosphere over North America and North Atlantic Ocean in January 2003 are compared with satellite radiance measurements from the Advanced Microwave Sounding Unit-A (AMSU-A). Four regions of strong gravity wave (GW) activities are found in the model simulations and the AMSU-A observations: the northwestern Atlantic, the U.S. Rockies, the Appalachians, and Greenland. GWs over the northwestern Atlantic Ocean are associated with the midlatitude baroclinic jet-front system, while the other three regions are apparently related to high topography. Model simulations are further used to analyze momentum fluxes in the zonal and meridional directions. It is found that strong westward momentum fluxes are prevalent over these regions over the whole period. Despite qualitative agreement between model simulations and satellite measurements, sensitivity experiments demonstrate that the simulated GWs are sensitive to the model spin-up time.

Original languageEnglish (US)
Pages (from-to)446-454
Number of pages9
JournalActa Meteorologica Sinica
Volume27
Issue number3
DOIs
StatePublished - Jun 1 2013

Fingerprint

Gravity waves
gravity wave
Satellites
AMSU
simulation
momentum
Momentum
Microwaves
Fluxes
Upper atmosphere
Troposphere
radiance
Topography
stratosphere
troposphere
topography
observation satellite
North America
comparison
ocean

All Science Journal Classification (ASJC) codes

  • Atmospheric Science
  • Ocean Engineering

Cite this

Zhang, Fuqing ; Zhang, Meng ; Wei, Junhong ; Wang, Shuguang. / Month-long simulations of gravity waves over North America and North Atlantic in comparison with satellite observations. In: Acta Meteorologica Sinica. 2013 ; Vol. 27, No. 3. pp. 446-454.
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abstract = "Mesoscale simulations of gravity waves in the upper troposphere and lower stratosphere over North America and North Atlantic Ocean in January 2003 are compared with satellite radiance measurements from the Advanced Microwave Sounding Unit-A (AMSU-A). Four regions of strong gravity wave (GW) activities are found in the model simulations and the AMSU-A observations: the northwestern Atlantic, the U.S. Rockies, the Appalachians, and Greenland. GWs over the northwestern Atlantic Ocean are associated with the midlatitude baroclinic jet-front system, while the other three regions are apparently related to high topography. Model simulations are further used to analyze momentum fluxes in the zonal and meridional directions. It is found that strong westward momentum fluxes are prevalent over these regions over the whole period. Despite qualitative agreement between model simulations and satellite measurements, sensitivity experiments demonstrate that the simulated GWs are sensitive to the model spin-up time.",
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Month-long simulations of gravity waves over North America and North Atlantic in comparison with satellite observations. / Zhang, Fuqing; Zhang, Meng; Wei, Junhong; Wang, Shuguang.

In: Acta Meteorologica Sinica, Vol. 27, No. 3, 01.06.2013, p. 446-454.

Research output: Contribution to journalArticle

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AB - Mesoscale simulations of gravity waves in the upper troposphere and lower stratosphere over North America and North Atlantic Ocean in January 2003 are compared with satellite radiance measurements from the Advanced Microwave Sounding Unit-A (AMSU-A). Four regions of strong gravity wave (GW) activities are found in the model simulations and the AMSU-A observations: the northwestern Atlantic, the U.S. Rockies, the Appalachians, and Greenland. GWs over the northwestern Atlantic Ocean are associated with the midlatitude baroclinic jet-front system, while the other three regions are apparently related to high topography. Model simulations are further used to analyze momentum fluxes in the zonal and meridional directions. It is found that strong westward momentum fluxes are prevalent over these regions over the whole period. Despite qualitative agreement between model simulations and satellite measurements, sensitivity experiments demonstrate that the simulated GWs are sensitive to the model spin-up time.

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