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Dynamical Downscaling of the Climate for the Hawaiian Islands Part I: Present-day

Zhang, Chunxi and Wang, Yuqing and Hamilton, Kevin and Lauer, Axel (2016) Dynamical Downscaling of the Climate for the Hawaiian Islands Part I: Present-day. Journal of Climate, 29 (8). American Meteorological Society. DOI: 10.1175/JCLI-D-15-0432.1 ISBN 10.1175/JCLI-D-15-0432.1 ISSN 0894-8755

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Official URL: http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-15-0432.1

Abstract

Hawaii’s high and steep topography leads to pronounced small scale variations in climate and this makes comprehensive modeling of the weather and climate particularly challenging. This paper describes a regional model formulation designed for simulations of the microclimates in Hawaii, and then documents and analyzes an extended retrospective simulation for near present day conditions. Part II will apply the model to projected climate conditions near the end of the present century. A nested version of the advanced Weather Research and Forecasting model with fine horizontal resolution and improved physics for the Hawaiian region has been configured. A 20-year triply-nested simulation of the atmospheric flow was undertaken with a 3-km Resolution mesh covering all main Hawaiian Islands and a 1-km mesh over Maui. Ocean surface temperatures are prescribed from observations and meteorological fields at the boundaries of the outermost domain are taken from global reanalyses. The simulations are compared to surface, balloon and satellite observations over the same period. The 3-km version of the model simulates realistically the frequency of trade wind inversions, time-mean rainfall and other variables on relatively small scales over Hawaii Island. There is a reasonable agreement between observed and simulated mean rainfall patterns over the other islands as well. However, the simulated distribution of mean rainfall over Kauai and (most particularly) Maui and Oahu reveals some significant deficiencies which we attribute to inadequate resolution of the topography on these islands. The 1-km simulation over Maui shows clear improvement in the mean rainfall over the 3-km version.

Item URL in elib:https://elib.dlr.de/103160/
Document Type:Article
Title:Dynamical Downscaling of the Climate for the Hawaiian Islands Part I: Present-day
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zhang, ChunxiInternational Pacific Research Center, University of HawaiiUNSPECIFIED
Wang, YuqingInternational Pacific Research Center, University of HawaiiUNSPECIFIED
Hamilton, KevinInternational Pacific Research Center, University of HawaiiUNSPECIFIED
Lauer, AxelDLR, IPAUNSPECIFIED
Date:15 April 2016
Journal or Publication Title:Journal of Climate
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:29
DOI :10.1175/JCLI-D-15-0432.1
Publisher:American Meteorological Society
ISSN:0894-8755
ISBN:10.1175/JCLI-D-15-0432.1
Status:Published
Keywords:Hawaii, climate change, dynamical downscaling, WRF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Lauer, Axel
Deposited On:27 Apr 2016 07:15
Last Modified:31 Jul 2019 20:00

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