edu.ucar.opensky::articles:22610 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:33:41.075105 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7tt4p9p https://doi.org/10.6073/pasta/84cf303ea3331fb47e8791aa61aa91b2 https Related Dataset #1 Shaler Meteorological Station at Harvard Forest 1964-2002 https://doi.org/10.6073/pasta/37ff12d47894a73ddd9d86c1225e2dc8 https Related Dataset #2 Biomass Inventories at Harvard Forest EMS Tower since 1993 https://doi.org/10.6073/pasta/33ba3432103297fe0644de6e0898f91f https Related Dataset #3 Soil Respiration, Temperature and Moisture at Harvard Forest EMS Tower since 1995 https://doi.org/10.6073/pasta/dd9351a3ab5316c844848c3505a8149d https Related Dataset #4 Canopy-Atmosphere Exchange of Carbon, Water and Energy at Harvard Forest EMS Tower since 1991 Spatiotemporal controls on observed daytime ozone deposition velocity over northeastern U.S. forests during summer 2019-05-27T00:00:00Z publication https://n2t.org/ark:/85065/d7tt4p9p https://doi.org/10.1029/2018JD029073 Clifton, Olivia E. author Fiore, A. M. author Munger, J. W. author Wehr, R. author UCAR/NCAR - Library publisher 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. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2019 American Geophysical Union. None eng geoscientificInformation