Spatiotemporal Controls on Observed Daytime Ozone Deposition Velocity Over Northeastern U.S. Forests During Summer
Spatiotemporal Controls on Observed Daytime Ozone Deposition Velocity Over Northeastern U.S. Forests During Summer
复制标题
夏季美国东北部森林观测到的白天臭氧沉积速度的时空控制
DOI:
10.1029/2018jd029073
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Wehr, R.
中科院分区:
文献类型:
--
作者:
Clifton, O. E.;Fiore, A. M.;Munger, J. W.;Wehr, R.
Spatiotemporal variability in ozone dry deposition is often overlooked despite its implications for interpreting and modeling tropospheric ozone concentrations accurately. Understanding the influences of stomatal versus nonstomatal deposition processes on ozone deposition velocity is important for attributing observed changes in the ozone depositional sink and associated damage to ecosystems. Here, we aim to identify the stomatal versus nonstomatal deposition processes driving observed variability in ozone deposition velocity over the northeastern United States during June–September. We use ozone eddy covariance measurements from Harvard Forest in Massachusetts, which span a decade, and from Kane Experimental Forest in Pennsylvania and Sand Flats State Forest in New York, which span one growing season each, along with observation‐driven modeling. Using a cumulative precipitation indicator of soil wetness, we infer that high soil uptake during dry years and low soil uptake during wet years may contribute to the twofold interannual variability in ozone deposition velocity at Harvard Forest. We link stomatal deposition and humidity to variability in ozone deposition velocity on daily timescales. The humidity dependence may reflect higher uptake by leaf cuticles under humid conditions, noted in previous work. Previous work also suggests that uptake by leaf cuticles may be enhanced after rain, but we find that increases in ozone deposition velocity on rainy days are instead mostly associated with increases in stomatal conductance. Our analysis highlights a need for constraints on subseasonal variability in ozone dry deposition to soil and fast in‐canopy chemistry during ecosystem stress.
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DOI:
10.5194/acpd-14-22793-2014
发表时间:
2014
期刊:
--
影响因子:
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作者:
Hardacre C
通讯作者:
Hardacre C
DOI:
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发表时间:
2016
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作者:
I. Fumagalli;C. Gruening;R. Marzuoli;S. Cieslik;G. Gerosa
通讯作者:
G. Gerosa
DOI:
--
发表时间:
2013
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作者:
S. Launiainen;G. Katul;T. Grönholm;T. Vesala
通讯作者:
T. Vesala
DOI:
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发表时间:
2016
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作者:
Jialu Li;A. Mahalov;P. Hyde
通讯作者:
P. Hyde
DOI:
--
发表时间:
2006
期刊:
Water, Air and Soil Pollution (in contribution)
影响因子:
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作者:
Sorimachi A.;Sakamoto K.
通讯作者:
Sakamoto K.