Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing

Tom V. Kokkonen, Sue Grimmond, Sonja Murto, Liu Huizhi, Anu-Maija Sundström, Leena Järvi

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

Although increased aerosol concentration modifies local air temperatures and boundary layer structure in urban areas, little is known about its effects on the urban hydrological cycle. Changes in the hydrological cycle modify surface runoff and flooding. Furthermore, as runoff commonly transports pollutants to soil and water, any changes impact urban soil and aquatic environments. To explore the radiative effect of haze on changes in the urban surface water balance in Beijing, different haze levels are modelled using the Surface Urban Energy and Water Balance Scheme (SUEWS), forced by reanalysis data. The pollution levels are classified using aerosol optical depth observations. The secondary aims are to examine the usability of a global reanalysis dataset in a highly polluted environment and the SUEWS model performance.

We show that the reanalysis data do not include the attenuating effect of haze on incoming solar radiation and develop a correction method. Using these corrected data, SUEWS simulates measured eddy covariance heat fluxes well. Both surface runoff and drainage increase with severe haze levels, particularly with low precipitation rates: runoff from 0.06 to 0.18 mm d−1 and drainage from 0.43 to 0.62 mm d−1 during fairly clean to extremely polluted conditions, respectively. Considering all precipitation events, runoff rates are higher during extremely polluted conditions than cleaner conditions, but as the cleanest conditions have high precipitation rates, they induce the largest runoff. Thus, the haze radiative effect is unlikely to modify flash flooding likelihood. However, flushing pollutants from surfaces may increase pollutant loads in urban water bodies.
Alkuperäiskielienglanti
LehtiAtmospheric Chemistry and Physics
Vuosikerta19
Numero10
Sivut7001-7017
Sivumäärä17
ISSN1680-7324
DOI - pysyväislinkit
TilaJulkaistu - 24 toukokuuta 2019
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 114 Fysiikka

Lainaa tätä

Kokkonen, Tom V. ; Grimmond, Sue ; Murto, Sonja ; Huizhi, Liu ; Sundström, Anu-Maija ; Järvi, Leena . / Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing. Julkaisussa: Atmospheric Chemistry and Physics. 2019 ; Vuosikerta 19, Nro 10. Sivut 7001-7017.
@article{407a33805fe542bd92e31f01de22b574,
title = "Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing",
abstract = "Although increased aerosol concentration modifies local air temperatures and boundary layer structure in urban areas, little is known about its effects on the urban hydrological cycle. Changes in the hydrological cycle modify surface runoff and flooding. Furthermore, as runoff commonly transports pollutants to soil and water, any changes impact urban soil and aquatic environments. To explore the radiative effect of haze on changes in the urban surface water balance in Beijing, different haze levels are modelled using the Surface Urban Energy and Water Balance Scheme (SUEWS), forced by reanalysis data. The pollution levels are classified using aerosol optical depth observations. The secondary aims are to examine the usability of a global reanalysis dataset in a highly polluted environment and the SUEWS model performance.We show that the reanalysis data do not include the attenuating effect of haze on incoming solar radiation and develop a correction method. Using these corrected data, SUEWS simulates measured eddy covariance heat fluxes well. Both surface runoff and drainage increase with severe haze levels, particularly with low precipitation rates: runoff from 0.06 to 0.18 mm d−1 and drainage from 0.43 to 0.62 mm d−1 during fairly clean to extremely polluted conditions, respectively. Considering all precipitation events, runoff rates are higher during extremely polluted conditions than cleaner conditions, but as the cleanest conditions have high precipitation rates, they induce the largest runoff. Thus, the haze radiative effect is unlikely to modify flash flooding likelihood. However, flushing pollutants from surfaces may increase pollutant loads in urban water bodies.",
keywords = "114 Physical sciences, Urban hydrology, SUEWS, Urban climate, atmospheric pollution, ATMOSPHERIC AEROSOLS",
author = "Kokkonen, {Tom V.} and Sue Grimmond and Sonja Murto and Liu Huizhi and Anu-Maija Sundstr{\"o}m and Leena J{\"a}rvi",
year = "2019",
month = "5",
day = "24",
doi = "10.5194/acp-19-7001-2019",
language = "English",
volume = "19",
pages = "7001--7017",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",
publisher = "COPERNICUS GESELLSCHAFT MBH",
number = "10",

}

Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing. / Kokkonen, Tom V.; Grimmond, Sue; Murto, Sonja; Huizhi, Liu; Sundström, Anu-Maija; Järvi, Leena .

julkaisussa: Atmospheric Chemistry and Physics, Vuosikerta 19, Nro 10, 24.05.2019, s. 7001-7017.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing

AU - Kokkonen, Tom V.

AU - Grimmond, Sue

AU - Murto, Sonja

AU - Huizhi, Liu

AU - Sundström, Anu-Maija

AU - Järvi, Leena

PY - 2019/5/24

Y1 - 2019/5/24

N2 - Although increased aerosol concentration modifies local air temperatures and boundary layer structure in urban areas, little is known about its effects on the urban hydrological cycle. Changes in the hydrological cycle modify surface runoff and flooding. Furthermore, as runoff commonly transports pollutants to soil and water, any changes impact urban soil and aquatic environments. To explore the radiative effect of haze on changes in the urban surface water balance in Beijing, different haze levels are modelled using the Surface Urban Energy and Water Balance Scheme (SUEWS), forced by reanalysis data. The pollution levels are classified using aerosol optical depth observations. The secondary aims are to examine the usability of a global reanalysis dataset in a highly polluted environment and the SUEWS model performance.We show that the reanalysis data do not include the attenuating effect of haze on incoming solar radiation and develop a correction method. Using these corrected data, SUEWS simulates measured eddy covariance heat fluxes well. Both surface runoff and drainage increase with severe haze levels, particularly with low precipitation rates: runoff from 0.06 to 0.18 mm d−1 and drainage from 0.43 to 0.62 mm d−1 during fairly clean to extremely polluted conditions, respectively. Considering all precipitation events, runoff rates are higher during extremely polluted conditions than cleaner conditions, but as the cleanest conditions have high precipitation rates, they induce the largest runoff. Thus, the haze radiative effect is unlikely to modify flash flooding likelihood. However, flushing pollutants from surfaces may increase pollutant loads in urban water bodies.

AB - Although increased aerosol concentration modifies local air temperatures and boundary layer structure in urban areas, little is known about its effects on the urban hydrological cycle. Changes in the hydrological cycle modify surface runoff and flooding. Furthermore, as runoff commonly transports pollutants to soil and water, any changes impact urban soil and aquatic environments. To explore the radiative effect of haze on changes in the urban surface water balance in Beijing, different haze levels are modelled using the Surface Urban Energy and Water Balance Scheme (SUEWS), forced by reanalysis data. The pollution levels are classified using aerosol optical depth observations. The secondary aims are to examine the usability of a global reanalysis dataset in a highly polluted environment and the SUEWS model performance.We show that the reanalysis data do not include the attenuating effect of haze on incoming solar radiation and develop a correction method. Using these corrected data, SUEWS simulates measured eddy covariance heat fluxes well. Both surface runoff and drainage increase with severe haze levels, particularly with low precipitation rates: runoff from 0.06 to 0.18 mm d−1 and drainage from 0.43 to 0.62 mm d−1 during fairly clean to extremely polluted conditions, respectively. Considering all precipitation events, runoff rates are higher during extremely polluted conditions than cleaner conditions, but as the cleanest conditions have high precipitation rates, they induce the largest runoff. Thus, the haze radiative effect is unlikely to modify flash flooding likelihood. However, flushing pollutants from surfaces may increase pollutant loads in urban water bodies.

KW - 114 Physical sciences

KW - Urban hydrology

KW - SUEWS

KW - Urban climate

KW - atmospheric pollution

KW - ATMOSPHERIC AEROSOLS

U2 - 10.5194/acp-19-7001-2019

DO - 10.5194/acp-19-7001-2019

M3 - Article

VL - 19

SP - 7001

EP - 7017

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 10

ER -