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Title: Understanding land use change impacts on microclimate using Weather Research and Forecasting (WRF) model

In order to explore potential climatic consequences of land cover change in the Kolkata Metropolitan Development area, we projected microclimate conditions in this area using the Weather Research and Forecasting (WRF) model driven by future land use scenarios. Specifically, we considered two land conversion scenarios including an urbanization scenario that all the wetlands and croplands would be converted to built-up areas, and an irrigation expansion scenario in which all wetlands and dry croplands would be replaced by irrigated croplands. Our results indicated that land use and land cover (LULC) change would dramatically increase regional temperature in this area under the urbanization scenario, but expanded irrigation tended to have a cooling effect. In the urbanization scenario, precipitation center tended to move eastward and lead to increased rainfall in eastern parts of this region. Increased irrigation stimulated rainfall in central and eastern areas but reduced rainfall in southwestern and northwestern parts of the study area. Our study also demonstrated that urbanization significantly reduced latent heat fluxes and albedo of land surface; while increased sensible heat flux changes following urbanization suggested that developed land surfaces mainly acted as heat sources. In this study, climate change projection not only predicts future spatiotemporal patterns ofmore » multiple climate factors, but also provides valuable insights into policy making related to land use management, water resource management, and agriculture management to adapt and mitigate future climate changes in this populous region.« less
Authors:
 [1] ;  [2] ;  [2] ;  [3]
  1. Univ. of Maryland, College Park, MD (United States). Dept. of Geographical Sciences
  2. Auburn Univ., AL (United States). Dept. of Geosciences
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Joint Global Change Resesarch Inst.
Publication Date:
Grant/Contract Number:
AC05-76RL01830
Type:
Accepted Manuscript
Journal Name:
Physics and Chemistry of the Earth, Parts A/B/C
Additional Journal Information:
Journal Name: Physics and Chemistry of the Earth, Parts A/B/C; Journal ID: ISSN 1474-7065
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Microclimate change; Urbanization; Wetland conversion; Weather Research and Forecasting model
OSTI Identifier:
1344908