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    New York City Impacts on a Regional Heat Wave

    Source: Journal of Applied Meteorology and Climatology:;2018:;volume 057:;issue 004::page 837
    Author:
    Ortiz, Luis E.
    ,
    Gonzalez, Jorge E.
    ,
    Wu, Wei
    ,
    Schoonen, Martin
    ,
    Tongue, Jeffrey
    ,
    Bornstein, Robert
    DOI: 10.1175/JAMC-D-17-0125.1
    Publisher: American Meteorological Society
    Abstract: ABSTRACTHeat waves are projected to increase in magnitude and frequency throughout this century because of increasing global temperatures, making it critically important to acquire improved understanding of their genesis and interactions with large cities. This study presents an application of the method of factor separation to assess combined impacts of a synoptic-scale heat wave, urban land cover, and urban energy and momentum fluxes on temperatures and winds over New York City, New York, via use of high-resolution simulations (1-km grid spacing) with an urbanized version of the Weather Research and Forecasting (WRF) Model. Results showed that factors behaved different throughout the day, with synoptic conditions dominating afternoon temperature contributions (>7°C). At night, combined urban surface factors contributed over 5°C during the heat wave and up to 1.5°C on non-heat-wave days. Positive interactions among all factors during morning and nighttime indicate an amplification of the urban heat island of up to 4°C during the heat wave. Midtown Manhattan vertical cross sections, where urban canopies are most dense, showed a change in the sign (from positive to negative) of the contribution of the urban fluxes between night and day below 500 m, possibly as a result of decreased radiative cooling from trapping by buildings and increased thermal storage by buildings as well as frictional effects that oppose the incoming warm air.
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      New York City Impacts on a Regional Heat Wave

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4261584
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    contributor authorOrtiz, Luis E.
    contributor authorGonzalez, Jorge E.
    contributor authorWu, Wei
    contributor authorSchoonen, Martin
    contributor authorTongue, Jeffrey
    contributor authorBornstein, Robert
    date accessioned2019-09-19T10:06:20Z
    date available2019-09-19T10:06:20Z
    date copyright2/12/2018 12:00:00 AM
    date issued2018
    identifier otherjamc-d-17-0125.1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4261584
    description abstractABSTRACTHeat waves are projected to increase in magnitude and frequency throughout this century because of increasing global temperatures, making it critically important to acquire improved understanding of their genesis and interactions with large cities. This study presents an application of the method of factor separation to assess combined impacts of a synoptic-scale heat wave, urban land cover, and urban energy and momentum fluxes on temperatures and winds over New York City, New York, via use of high-resolution simulations (1-km grid spacing) with an urbanized version of the Weather Research and Forecasting (WRF) Model. Results showed that factors behaved different throughout the day, with synoptic conditions dominating afternoon temperature contributions (>7°C). At night, combined urban surface factors contributed over 5°C during the heat wave and up to 1.5°C on non-heat-wave days. Positive interactions among all factors during morning and nighttime indicate an amplification of the urban heat island of up to 4°C during the heat wave. Midtown Manhattan vertical cross sections, where urban canopies are most dense, showed a change in the sign (from positive to negative) of the contribution of the urban fluxes between night and day below 500 m, possibly as a result of decreased radiative cooling from trapping by buildings and increased thermal storage by buildings as well as frictional effects that oppose the incoming warm air.
    publisherAmerican Meteorological Society
    titleNew York City Impacts on a Regional Heat Wave
    typeJournal Paper
    journal volume57
    journal issue4
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-17-0125.1
    journal fristpage837
    journal lastpage851
    treeJournal of Applied Meteorology and Climatology:;2018:;volume 057:;issue 004
    contenttypeFulltext
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