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Vulnerability and Forest Resource Dependency in India's Westem Ghats Firooza Pavri ........... ........................................................................................ ..80 A Comparison of Survey Methods for Small,... more
Vulnerability and Forest Resource Dependency in India's Westem Ghats Firooza Pavri ........... ........................................................................................ ..80 A Comparison of Survey Methods for Small, Road-Killed Animals in Madison County, Illinois Michael J. Starr and Andrea L. Knobloch ............................................................. ... ... Residential Segregation and Socioeconomic Inequality for the Latino Commimity in Reading, PA Mark E. Reisinger ............................................................ ....................................................... ..349 Analyzing the Spatial Distribution of Industrial ...
ABSTRACT The tropical cyclogenesis (TCG) of Atlantic Hurricane Cindy (2005) was investigated to study environmental conditions preceding mesoscale vortex development in the Intra-Americas Sea (IAS; i.e., the Gulf of Mexico and Caribbean... more
ABSTRACT The tropical cyclogenesis (TCG) of Atlantic Hurricane Cindy (2005) was investigated to study environmental conditions preceding mesoscale vortex development in the Intra-Americas Sea (IAS; i.e., the Gulf of Mexico and Caribbean Sea) using the ERA-Interim Reanalysis pressure level data. Major findings include that the development of a mesoscale vortex occurred downward over Central America due to 600 hPa level enhanced winds downstream of southeasterly winds from northern South America, triggering Cindy's TCG in a few days. The contribution of midlevel enhanced winds should be noted as a potential precursor of other TCGs in the IAS.
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Living-learning communities (LLCs) have become an important part of the educational experience for many first-year university students. As academic units seek new ways to reach undergraduate students, partnering with an LLC is often an... more
Living-learning communities (LLCs) have become an important part of the educational experience for many first-year university students. As academic units seek new ways to reach undergraduate students, partnering with an LLC is often an effective solution. This article explores a largely untapped link between LLCs and geography. An inventory of LLCs at USA universities with PhD-granting geography departments and a
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Severe Florida citrus freezes since 1880 are identified and described in terms of the horticultural damage, overall frequency of occurrence, and association with polar anticyclone outbreaks in the plains of southern Canada and the United... more
Severe Florida citrus freezes since 1880 are identified and described in terms of the horticultural damage, overall frequency of occurrence, and association with polar anticyclone outbreaks in the plains of southern Canada and the United States. The most severe `advective' freezes are associated with strong cold anticyclones having tracks southward across the plains to Texas with subsequent northeastward movement. Other anticyclones move in a track somewhat east of this and ultimately pass over Florida or the eastern Gulf of Mexico. Over 80% of the worst Florida citrus freezes are associated with anticyclones with central pressures in excess of 1045 mb moving along these paths. However, anticyclones of similar intensity with more zonally oriented paths across higher latitudes are associated with minor citrus damage. The major freezes tend to be clustered in time in the 1890s and since 1977. On interdecadal time scales, the recent freezes are not linked to higher winter mean pressure in the northern plains, and there has not been an unusually high frequency of strong anticyclones in recent decades, compared to earlier this century. Compared to the freeze-free period of 1948-57, the winters of 1977-86 are characterized by a more amplified 500-mb mean standing wave pattern across North America. This is linked to changes in the Pacific/North American upper-air teleconnection pattern, the index for which had much lower values (characterized by zonal flow) prior to 1958.
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... Jillian L. Wilkerson School of Plant, Environmental, and Soil Sciences Louisiana State University Baton Rouge, Louisiana 70803-4105 ... In addition to the Southern Oscillation index (SOI), which uses sea level pressure (SLP) at Tahiti... more
... Jillian L. Wilkerson School of Plant, Environmental, and Soil Sciences Louisiana State University Baton Rouge, Louisiana 70803-4105 ... In addition to the Southern Oscillation index (SOI), which uses sea level pressure (SLP) at Tahiti and Darwin, Australia, to characterize the ...
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ABSTRACT Increasing awareness of the impacts of global climate change on marine ecosystems and concerns about shifting bioclimatic and agricultural zones necessitate a reassessment of the geographical distribution of Earth’s climate... more
ABSTRACT Increasing awareness of the impacts of global climate change on marine ecosystems and concerns about shifting bioclimatic and agricultural zones necessitate a reassessment of the geographical distribution of Earth’s climate types. In recent years, the availability of truly global data-sets has allowed for the application of climatic types, including the Kppen–Geiger system, over the oceans. This research uses NCAR Reanalysis data to create a global ‘Extended Kppen–Geiger climate classification’, including the world ocean, for the 1981−2010 averaging period. The percentages of Earth’s surface covered by tropical rainforest (Af), tropical monsoon (Am), and (especially) the mesothermal– mild summer (Cfc) climate types are much larger than in the terrestrial only analysis. Expanding and contracting terrestrial climate zones are also identified based on the differences in the total area through comparison with maps produced for 1901−1925, 1926−1950, 1951−1975, 1976−2000 and model-output-based predicted Kppen–Geiger types for 2076−2100. Results suggest that hot desert (BWh), hot semi-arid (BSh), and Af climatic types are projected to expand, while the tundra and most mesothermal and microthermal types will decrease in area. These results assist in projecting global impacts of climatic change.
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ABSTRACT The process and development sequence of meso-beta-scale vortices at multiple levels and the synoptic-scale environmental conditions for the genesis of Tropical Storm Arlene (2005) were analyzed using ERA-Interim Reanalysis data... more
ABSTRACT The process and development sequence of meso-beta-scale vortices at multiple levels and the synoptic-scale environmental conditions for the genesis of Tropical Storm Arlene (2005) were analyzed using ERA-Interim Reanalysis data and Weather Research and Forecasting (WRF) model simulations. Results from the two agree in that although the confluence of low-level westerly winds from the eastern North Pacific and low-level easterly winds from the North Atlantic preceded tropical cyclogenesis over the western Caribbean Sea, midlevel enhanced wind surges over Lake Nicaragua were also important in the pregenesis period. A closer examination of the WRF simulation revealed that the midlevel enhanced wind surges were produced by the interactions between the 500 hPa anticyclone over Mexico and a wind stream from northern South America. The 500 hPa surges augmented the vorticity of the incipient storm as it passed over Lake Nicaragua. Due to the subsequent influxes of strong westerly and easterly winds in the lower atmosphere, the midlevel vortex development was followed by a low-level vorticity increase, enhancing the vertical structure of the vortex motion of the storm from the 500 hPa level downward. This vortex development resulted in tropical cyclogenesis at 1800 UTC on 8 June and a tropical storm by 0600 UTC on 9 June.
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ABSTRACT January 2014 will be remembered for the sensationalized media usage of the term 'polar vortex' which coincided with several polar air outbreaks. A United States polar vortex (USPV) perspective is presented to... more
ABSTRACT January 2014 will be remembered for the sensationalized media usage of the term 'polar vortex' which coincided with several polar air outbreaks. A United States polar vortex (USPV) perspective is presented to better understand the January spatial and temporal variability of this regional component of the Northern Hemisphere circumpolar vortex. Use of the monthly mean 5460 meter isohypse to represent the location of the USPV extent and area revealed that the spatial features of the January 2014 USPV were not extreme relative to certain 1948-2013 Januaries. Furthermore, the Arctic Oscillation (AO), Pacific-North American (PNA) Pattern, and Pacific Decadal Oscillation (PDO) are all linked to southernmost latitude of the USPV trough, but the PDO and PNA are most closely associated with the longitude at which this latitude occurs. The AO is closely related to the area of the United States enclosed within the USPV.
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ABSTRACT Links between hurricane track changes and upper atmospheric potential vorticity (PV) anomaly patterns were identified qualitatively and analytically between 1990 and 2005 in the Western Atlantic. Strong track changes of... more
ABSTRACT Links between hurricane track changes and upper atmospheric potential vorticity (PV) anomaly patterns were identified qualitatively and analytically between 1990 and 2005 in the Western Atlantic. Strong track changes of hurricanes, particularly the constellations that triggered northward acceleration of the storm systems, were associated with upper-air PV patterns characterized by strongly positive anomalies to the northeast in combination with weak PV to the north of the system center. Constellations that triggered eventual eastward acceleration were associated with strongly positive PV anomalies to the northwest in combination with weak PV to the northeast of the system center. These results may assist hurricane forecasters and modelers in identifying possible signatures of future tropical cyclone tracks.
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ABSTRACT The tropical cyclogenesis (TCG) of Atlantic Hurricane Cindy (2005) was investigated to study environmental conditions preceding mesoscale vortex development in the Intra-Americas Sea (IAS; i.e., the Gulf of Mexico and Caribbean... more
ABSTRACT The tropical cyclogenesis (TCG) of Atlantic Hurricane Cindy (2005) was investigated to study environmental conditions preceding mesoscale vortex development in the Intra-Americas Sea (IAS; i.e., the Gulf of Mexico and Caribbean Sea) using the ERA-Interim Reanalysis pressure level data. Major findings include that the development of a mesoscale vortex occurred downward over Central America due to 600 hPa level enhanced winds downstream of southeasterly winds from northern South America, triggering Cindy's TCG in a few days. The contribution of midlevel enhanced winds should be noted as a potential precursor of other TCGs in the IAS.
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... Jillian L. Wilkerson School of Plant, Environmental, and Soil Sciences Louisiana State University Baton Rouge, Louisiana 70803-4105 ... In addition to the Southern Oscillation index (SOI), which uses sea level pressure (SLP) at Tahiti... more
... Jillian L. Wilkerson School of Plant, Environmental, and Soil Sciences Louisiana State University Baton Rouge, Louisiana 70803-4105 ... In addition to the Southern Oscillation index (SOI), which uses sea level pressure (SLP) at Tahiti and Darwin, Australia, to characterize the ...
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Living-learning communities (LLCs) have become an important part of the educational experience for many first-year university students. As academic units seek new ways to reach undergraduate students, partnering with an LLC is often an... more
Living-learning communities (LLCs) have become an important part of the educational experience for many first-year university students. As academic units seek new ways to reach undergraduate students, partnering with an LLC is often an effective solution. This article explores a largely untapped link between LLCs and geography. An inventory of LLCs at USA universities with PhD-granting geography departments and a
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... Mots-clés anglais / English Keywords. Climatic condition. ; Atmospheric circulation. ; Air mass. ; Climate element. ; Anticyclone. ; Polar region. ; ... Mots-clés espagnols / Spanish Keywords. Condición climática. ; Circulación... more
... Mots-clés anglais / English Keywords. Climatic condition. ; Atmospheric circulation. ; Air mass. ; Climate element. ; Anticyclone. ; Polar region. ; ... Mots-clés espagnols / Spanish Keywords. Condición climática. ; Circulación atmósferica. ; Masa aire. ; Elemento climático. ; Anticiclón. ; ...
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Many applied climatological studies use teleconnection indices to characterize atmospheric flow. Although these indices are often associated with temperature and precipitation patterns, surprisingly little attention has been paid to... more
Many applied climatological studies use teleconnection indices to characterize atmospheric flow. Although these indices are often associated with temperature and precipitation patterns, surprisingly little attention has been paid to changes in the flow patterns within ...
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Abstract Tropospheric ozone (O3) is a pollutant of increasing concern in many urban areas in the United States. There is an increasing need to understand the geographical and meteorological properties associated with O3, particularly... more
Abstract Tropospheric ozone (O3) is a pollutant of increasing concern in many urban areas in the United States. There is an increasing need to understand the geographical and meteorological properties associated with O3, particularly because of the changing criteria that are being implemented by the US Environmental Protection Agency to monitor O3. This research examines the relationship between O3 mixing ratios in Louisiana and surface and low-tropospheric synoptic circulation patterns. Results suggest that local conditions and ...
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Niño-induced precipitation signal in the central Gulf South. The predominant mechanism used to explain these relationships focuses on increased energy and moisture fluxes from the tropics to the mid-latitudes during El Niño events. The... more
Niño-induced precipitation signal in the central Gulf South. The predominant mechanism used to explain these relationships focuses on increased energy and moisture fluxes from the tropics to the mid-latitudes during El Niño events. The result is a highly amplified mean ...
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... Research on Clay Soil Ernest L. Clawson,* Sean A. Hribal, Giovanni Piccinni, Robert L. Hutchinson, Robert V. Rohli, and Daniel L. Thomas Page 2. ... Agric. For. Meteorol. 78:223237. Schneider, AD, TA Howell, ATA Moustafa, SR Evett,... more
... Research on Clay Soil Ernest L. Clawson,* Sean A. Hribal, Giovanni Piccinni, Robert L. Hutchinson, Robert V. Rohli, and Daniel L. Thomas Page 2. ... Agric. For. Meteorol. 78:223237. Schneider, AD, TA Howell, ATA Moustafa, SR Evett, and W. Abou-Zeid. 1998. ...
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Approved by FEMA on April 2, 2014, the 2014 SHMP plan update continues to build on Louisiana's commitment to hazard mitigation. The State of Louisiana's vision was to produce a hazard mitigation plan that is an educational and easy to... more
Approved by FEMA on April 2, 2014, the 2014 SHMP plan update continues to build on Louisiana's commitment to hazard mitigation. The State of Louisiana's vision was to produce a hazard mitigation plan that is an educational and easy to read for the average person. Valuable functions of the plan:
Demonstrates the State's commitment to reduce risks from natural hazards.
Documents Louisiana's progress in identifying risks and mitigating against the effects of natural and manmade disasters.
Serves as a reference document for local government officials as they develop local hazard mitigation plans.
Serves as a reference document to Louisiana citizens
Key Points Updated:
Capability Assessments
Funding Allocations of Past Events
State Historic Site Preservation Vulnerability Assessment
Demonstrates the State's commitment to reduce risks from natural hazards.
Documents Louisiana's progress in identifying risks and mitigating against the effects of natural and manmade disasters.
Serves as a reference document for local government officials as they develop local hazard mitigation plans.
Serves as a reference document to Louisiana citizens
Key Points Updated:
Capability Assessments
Funding Allocations of Past Events
State Historic Site Preservation Vulnerability Assessment