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i

The Influence of Climate Feedbacks on Regional Hydrological Changes Under Global Warming



Details

  • Journal Title:
    Geophysical Research Letters
  • Personal Author:
  • NOAA Program & Office:
    CIRES (Cooperative Institute for Research in Environmental Sciences)
  • Description:
    The influence of climate feedbacks on regional hydrological changes under warming is poorly understood. Here, a moist energy balance model (MEBM) with a Hadley Cell parameterization is used to isolate the influence of climate feedbacks on changes in zonal‐mean precipitation‐minus‐evaporation (P − E) under greenhouse‐gas forcing. It is shown that cloud feedbacks act to narrow bands of tropical P − E and increase P − E in the deep tropics. The surface‐albedo feedback shifts the location of maximum tropical P − E and increases P − E in the polar regions. The intermodel spread in the P − E changes associated with feedbacks arises mainly from cloud feedbacks, with the lapse‐rate and surface‐albedo feedbacks playing important roles in the polar regions. The P − E change associated with cloud feedback locking in the MEBM is similar to that of a climate model with inactive cloud feedbacks. This work highlights the unique role that climate feedbacks play in causing deviations from the “wet‐gets‐wetter, dry‐gets‐drier” paradigm.
  • Source:
    Geophysical Research Letters, 51(3)
  • DOI:
  • ISSN:
    0094-8276 ; 1944-8007
  • Format:
    pdf
  • Publisher:
    American Geophysical Union (AGU)
  • Document Type:
    Journal Article
  • License:
  • Rights Information:
    CC BY
  • Compliance:
    Library
  • Main Document Checksum:
    urn:sha-512:834d9b74b585cd7f9302b59e99ea0d1a7527a25436fd5ef4c72ba0b3c32d4847c165039b0e508c3154c9c0c0ce3364db49b258d5ed043c2b9edbd17cffc17e2d
  • Download URL:
  • File Type:
    Filetype[PDF - 1.62 MB ]
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