Evapotranspiration over spatially extensive plant communities in the Big Cypress National Preserve, southern Florida, 2007-2010

Shoemaker, W. Barclay; Lopez, Christian D.; Duever, Michael J.

doi:10.3133/sir20115212

Cited by 26 publications

(36 citation statements)

References 22 publications

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“…Wetland water levels and surface energy fluxes are tightly coupled to seasonality in heat and humidity. Cold fronts are especially remarkable within surface energy budgets, as dry cold air passes over relatively warm soil and surface water, creating large variations in both stored-heat energy and turbulent fluxes of heat and water vapor (Shoemaker et al, 2011). During this study, air temperatures at all three sites (Fig.…”

Section: Seasonality In Rainfall Temperature Water Levels and Energmentioning

confidence: 99%

Carbon exchange between the atmosphere and subtropical forested cypress and pine wetlands

Shoemaker

Anderson

Barr³

et al. 2015

Biogeosciences

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Abstract. Carbon dioxide exchange between the atmosphere and forested subtropical wetlands is largely unknown. Here we report a first step in characterizing this atmospheric–ecosystem carbon (C) exchange, for cypress strands and pine forests in the Greater Everglades of Florida as measured with eddy covariance methods at three locations (Cypress Swamp, Dwarf Cypress and Pine Upland) for 2 years. Links between water and C cycles are also examined at these three sites, as are methane emission measured only at the Dwarf Cypress site. Each forested wetland showed net C uptake from the atmosphere both monthly and annually, as indicated by the net ecosystem exchange (NEE) of carbon dioxide (CO2). For this study, NEE is the difference between photosynthesis and respiration, with negative values representing uptake from the atmosphere that is retained in the ecosystem or transported laterally via overland flow (unmeasured for this study). Atmospheric C uptake (NEE) was greatest at the Cypress Swampp (−900 to −1000 g C m2 yr−1), moderate at the Pine Upland (−650 to −700 g C m2 yr−1) and least at the Dwarf Cypress (−400 to −450 g C m2 yr−1). Changes in NEE were clearly a function of seasonality in solar insolation, air temperature and flooding, which suppressed heterotrophic soil respiration. We also note that changes in the satellite-derived enhanced vegetation index (EVI) served as a useful surrogate for changes in NEE at these forested wetland sites.

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Section: Seasonality In Rainfall Temperature Water Levels and Energmentioning

confidence: 99%

Carbon exchange between the atmosphere and subtropical forested cypress and pine wetlands

Shoemaker

Anderson

Barr³

et al. 2015

Biogeosciences

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“…Similarly, the Pine Upland site had an average dry season of 1.77 mm/day, which again was lower than the ET estimates of previous studies. The control values provided by Shoemaker [32], 2.01 mm/day for the Marsh site and 1.82 mm/day for the Pine Upland site, showed that the low dry season ET estimates were not necessarily due to poor model performance, but that the dry season ET rates estimated during the study period were lower than those of previous study periods. The average experimental dry season ET across all five control sites was 1.92 mm/day, which fell within the range of ET values observed in previous studies [11,33,41].…”

Section: Comparisons With Other Studiesmentioning

confidence: 50%

“…The USGS data were part of an earlier study [32] that collected data from five sites located inside Big Cypress National Preserve (Figure 1b). Each site is distinguished by the type of land cover the ET measuring equipment was installed upon (see descriptions in Table 2).…”

Section: Data Setmentioning

confidence: 99%

Operational Actual Wetland Evapotranspiration Estimation for South Florida Using MODIS Imagery

et al. 2015

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Evapotranspiration is a reliable indicator of wetland health. Wetlands are an important and valuable ecosystem on the South Florida landscape. Accurate wetland Actual Evapotranspiration (AET) data can be used to evaluate the performance of South Florida's Everglades restoration programs. However, reliable AET measurements rely on scattered point measurements restricting applications over a larger area. The objective of this study was to validate the ability of the Simplified Surface Energy Balance (SSEB) approach and the Simple Method (also called the Abtew Method) to provide large area AET estimates for wetland recovery efforts. The study used Moderate Resolution Imaging Spectroradiometer (MODIS) sensor spectral data and South Florida Water Management District (SFWMD) solar radiation data to derive weekly AET values for South Florida. The SSEB-Simple Method approach provided acceptable results with good agreement with observed values during the critical dry season period, when cloud cover was low (rave (n = 59) = 0.700, pave < 0.0005), but requires further refinement to be viable for yearly estimates because of poor performance during wet season months, mainly because of cloud contamination. The approach can be useful for short-term wetland recovery assessment projects that occur during the dry season and/or long term projects that compare site AET rates from dry season to dry season. OPEN ACCESSRemote Sens. 2015, 7 3614

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“…This can be seen in Figure 4.5, which plots the Etf values at the control sites from 2008 to 2010. The plot shows how Etf values fall to values around 0.2 during wet season, a time of year where Etf is expected to be at its highest (Shoemaker, 2011). This pattern repeats for all five sites and it is a direct effect of the missing temperature data due to extended periods of cloud cover.…”

Section: ) Each Site Ismentioning

confidence: 81%

“…The USGS data were part of an earlier study (Shoemaker, 2011) which collected data from 5 sites located inside Big Cypress National Preserve (Fig. 3.…”

Section: Actual Evapotranspiration (Aet) Calculation and Validationmentioning

confidence: 99%

Operational Actual Wetland Evapotranspiration Estimation for South Florida Using MODIS Imagery

Ceron¹

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Evapotranspiration over spatially extensive plant communities in the Big Cypress National Preserve, southern Florida, 2007-2010

Cited by 26 publications

References 22 publications

Carbon exchange between the atmosphere and subtropical forested cypress and pine wetlands

Carbon exchange between the atmosphere and subtropical forested cypress and pine wetlands

Operational Actual Wetland Evapotranspiration Estimation for South Florida Using MODIS Imagery

Operational Actual Wetland Evapotranspiration Estimation for South Florida Using MODIS Imagery

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