scholarly journals How Tropical Cyclones Influence Photosynthesis

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
David Shultz

A new modeling study gives insight into how tropical cyclones affected ecosystems in the southeastern United States between 2002 and 2012.

1994 ◽  
Vol 18 (2) ◽  
pp. 60-64 ◽  
Author(s):  
Gary L. Achtemeier ◽  
James T. Paul

Abstract We are developing a numerical wind model to simulate airflow near the ground at night over terrain typical of the Piedmont of the southeastern United States. The purpose is to improve understanding of night winds and provide more accurate prediction of smoke movement when wind speed is low and wind direction is highly variable. These conditions often prevail when fog or a combination of smoke and fog produce low visibility. The model was tested with a weather event that produced local dense fog implicated as a factor in a highway accident. The model provides insight into drainage winds and valley flows and hence promises to be useful for predicting smoke movement at night. South. J. Appl. For. 18(2):60-64.


2013 ◽  
Vol 45 (3) ◽  
pp. 519-522
Author(s):  
Kelly Lange

The three articles in this invited paper session investigate challenges and opportunities for agricultural producers in the southeastern United States. Two of the articles focus on the increasing demand for locally produced food and offer insight into potential marketing opportunities that this growing demand may provide for beginning or young farmers. The third article centers on financing options that are available to beginning farmers and evaluates the use of Aggie Bonds as a financing source for beginning farmers.


2013 ◽  
Vol 45 (3) ◽  
pp. 509-518 ◽  
Author(s):  
McKenzie Maples ◽  
Kimberly L. Morgan ◽  
Matthew G. Interis ◽  
Ardian Harri

To capitalize on potential opportunities presented by growing consumer demand for locally grown foods, farmers need insight into significant motivations and behavioral characteristics of consumers in their region. This article aims to evaluate the characteristics of southeastern urban consumers who purchased food directly from producers. Novel study findings include the impact of disease incidences that occurred in respondent and related family members, a more accurate understanding of U.S. agriculture, relatively higher levels of concern about U.S. food safety, and greater physical activity levels, which are significant motivators of increased likelihood to purchase direct from producers.


2013 ◽  
Vol 26 (21) ◽  
pp. 8440-8452 ◽  
Author(s):  
Justin T. Maxwell ◽  
Jason T. Ortegren ◽  
Paul A. Knapp ◽  
Peter T. Soulé

Abstract Precipitation from land-falling tropical cyclones (TCs) has a significant hydroclimatic influence in the southeastern United States, particularly during drought years. The frequency with which TCs ended drought conditions was examined for southeastern coastal states from Texas to North Carolina during 1895–2011. The region was divided into the Gulf Coast states (GCS) and the southeastern Atlantic coast states (ACS). The spatiotemporal patterns of tropical cyclone drought busters (TCDBs) were analyzed. Larger-scale ocean–atmosphere influences on TCDBs were examined using chi-squared analysis. The ACS experienced TCDBs more frequently and farther inland compared to the GCS. The number of TCDBs has significantly increased with time in the ACS. TCDBs numbers in the GCS did not exhibit significant increases, but the area alleviated of drought conditions increased significantly in the last 117 years. The dominant larger-scale ocean–atmosphere forcing of TCDBs was a combination of a warm Atlantic Ocean [positive Atlantic multidecadal oscillation index (AMO+)] and weak westerlies [negative North Atlantic Oscillation index (NAO−)]. AMO+ leads to an increase in the number of TCs throughout the North Atlantic basin, and NAO− increases the likelihood of TC landfall by controlling the steering of TCs toward the southeastern United States.


2013 ◽  
Vol 26 (3) ◽  
pp. 1047-1062 ◽  
Author(s):  
Olivier P. Prat ◽  
Brian R. Nelson

Abstract The objective of this paper is to characterize the precipitation amounts originating from tropical cyclones (TCs) in the southeastern United States during the tropical storm season from June to November. Using 12 years of precipitation data from the Tropical Rainfall Measurement Mission (TRMM), the authors estimate the TC contribution on the seasonal, interannual, and monthly precipitation budget using TC information derived from the International Best Track Archive for Climate Stewardship (IBTrACS). Results derived from the TRMM Multisatellite Precipitation Analysis (TMPA) 3B42 showed that TCs accounted for about 7% of the seasonal precipitation total from 1998 to 2009. Rainfall attributable to TCs was found to contribute as much as 8%–12% for inland areas located between 150 and 300 km from the coast and up to 15%–20% for coastal areas from Louisiana to the Florida Panhandle, southern Florida, and coastal Carolinas. The interannual contribution varied from 1.3% to 13.8% for the period 1998–2009 and depended on the TC seasonal activity, TC intensity, and TC paths as they traveled inland. For TCs making landfall, the rainfall contribution could be locally above 40% and, on a monthly basis, TCs contributed as much as 20% of September rainfall. The probability density functions of rainfall attributable to tropical cyclones showed that the percentage of rainfall associated with TC over land increased with increasing rain intensity and represent about 20% of heavy rainfall (>20 mm h−1), while TCs account for less than 5% of all seasonal precipitation events.


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