Climatic Anomalies in Latent and Sensible Heat Fluxes From Remnant Forest and Cropland in U.S. Midwest Corn Belt

Authors: Mikael Hiestand*,
Topics: Climatology and Meteorology, Land Use and Land Cover Change, Environment
Keywords: Corn Belt, Latent Heat Flux, Sensible Heat Flux, Precipitation, Phenology, Climate, Evapotranspiration, Convection
Session Type: Paper
Day: 4/5/2019
Start / End Time: 9:55 AM / 11:35 AM
Room: Madison B, Marriott, Mezzanine Level
Presentation File: No File Uploaded

Differing land surface fluxes in latent and sensible heat from remnant forests and croplands in the U.S. Corn Belt are thought to influence deep convection and precipitation in a region of rain-fed agriculture. The surface heat fluxes must first be put into a climatic context before a detailed analysis on how differing land use/land cover (LULC) types in the Corn Belt influence deep convection. Data from AmeriFlux towers in both remnant forest and cropland were used to develop a 9-year climatology of afternoon latent and sensible heat fluxes for both LULC types during the summer growing season. Linear regression shows statistically significant correlations between the heat fluxes (both latent and sensible) with the vapor pressure deficit, air temperature and net radiation for both LULC types. Additionally, the remnant forest displays growing seasons of anomalous sensible heat fluxes, while the cropland shows climatic anomalies in the latent heat fluxes. Understanding the surface heat fluxes from different LULC types within a climatological context will lead to a better understanding of how LULC can influence deep convection and precipitation within the Corn Belt.

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