Isolating effects of terrain and soil moisture heterogeneity on the atmospheric boundary layer: Idealized simulations to diagnose land-atmosphere feedbacks

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Title:Main Title: Isolating effects of terrain and soil moisture heterogeneity on the atmospheric boundary layer: Idealized simulations to diagnose land-atmosphere feedbacks
Description:Abstract: The effects of terrain, soil moisture heterogeneity, subsurface properties, and water table dynamics on the development and behavior of the atmospheric boundary layer are studied through a set of idealized numerical experiments. The mesoscale atmospheric model Advanced Regional Prediction System (ARPS) is used to isolate the effects of subsurface heterogeneity, terrain, and soil moisture initialization. The simulations are initialized with detailed soil moisture distributions obtained from offline spin-ups using a coupled surface-subsurface model (ParFlow-CLM). In these idealized simulations, we observe that terrain effects dominate the planetary boundary layer (PBL) development during early morning hours, while the soil moisture signature overcomes that of terrain during the afternoon. Water table and subsurface properties produce a similar effect as that of soil moisture as their signatures (reflected in soil moisture profiles, energy fluxes, and evaporation at the land surface) can also overcome that of terrain during afternoon hours. This is mostly clear for land surface energy fluxes and evaporation at the land surface. We also observe the coupling between water table depth and planetary boundary layer depth in our cases is strongest within wet-to-dry transition zones. This extends the findings of previous studies which demonstrate the subsurface connection to surface energy fluxes is strongest in such transition zones. We investigate how this connection extends into the atmosphere and can affect the structure and development of the convective boundary layer.
Identifier:10.1002/2014MS000371 (DOI)
Citation Advice:Rihani, J., Chow, F.K., and Maxwell, R.M. Isolating Effects of Terrain and Soil Moisture Heterogeneity on the Atmospheric Boundary Layer: Idealized simulations to diagnose land-atmosphere feedbacks. Journal of Advances in Modeling Earth Systems doi:10.1002/2014MS000371, 2015.
Responsible Party
Creators:Jehan Rihani (Author), Fotini K. Chow (Author), Reed M. Maxwell (Author)
Contributors:Fotini K. Chow (Supervisor), Reed M. Maxwell (Supervisor)
Publisher:Wiley
Publication Year:2015
Topic
TR32 Topic:Atmosphere
Related Subproject:C4
Subjects:Keywords: Atmosphere–Land Interaction, Soil Moisture, Boundary Layer
Geogr. Information Topic:Climatology/Meteorology/Atmosphere
File Details
Filename:Rihani_etal_JAMES_2015.pdf
Data Type:Text - Article
File Size:2.5 MB
Date:Accepted: 11.05.2015
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Free
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:[TR32DB] Data policy agreement
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Specific Information - Publication
Publication Status:Accepted
Review Status:Peer reviewed
Publication Type:Article
Source:Journal of Advances in Modeling Earth Systems
Source Website:http://onlinelibrary.wiley.com/doi/10.1002/2014MS000371/epdf
Number of Pages:23 (1 - 23)
Metadata Details
Metadata Creator:Jehan Rihani
Metadata Created:07.07.2015
Metadata Last Updated:07.07.2015
Subproject:C4
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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