The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought
Observations from the Oklahoma Mesonet and high resolution Weather Research and Forecasting model simulations were used to evaluate the effect that the dry line and large-scale atmospheric patterns had on drought evolution during 2011. Mesonet observations showed that a “dry” and “wet” pattern devel...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2017/8430743 |
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| author | Paul X. Flanagan Jeffrey B. Basara Bradley G. Illston Jason A. Otkin |
| author_facet | Paul X. Flanagan Jeffrey B. Basara Bradley G. Illston Jason A. Otkin |
| author_sort | Paul X. Flanagan |
| collection | DOAJ |
| description | Observations from the Oklahoma Mesonet and high resolution Weather Research and Forecasting model simulations were used to evaluate the effect that the dry line and large-scale atmospheric patterns had on drought evolution during 2011. Mesonet observations showed that a “dry” and “wet” pattern developed across Oklahoma due to anomalous atmospheric patterns. The location of the dry line varied due to this “dry” and “wet” pattern, with the average dry line location around 1.5° longitude further to the east than climatology. Model simulations were used to further quantify the impact of variable surface conditions on dry line evolution and convective initiation (CI) during April and May 2011. Specifically, soil moisture conditions were altered to depict “wet” and “dry” conditions across the domain by replacing the soil moisture values by each soil category’s porosity or wilting point value. Overall, the strength of the dry line boundary, its position, and subsequent CI were dependent on the modification of soil moisture. The simulations demonstrated that modifying soil moisture impacted the nature of the dry line and showed that soil moisture conditions during the first half of the warm season modified the dry line pattern and influenced the evolution and perpetuation of drought over Oklahoma. |
| format | Article |
| id | doaj-art-8882a9eb3a3d40c4b5754b0e50e0ccdc |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-8882a9eb3a3d40c4b5754b0e50e0ccdc2025-08-20T03:38:06ZengWileyAdvances in Meteorology1687-93091687-93172017-01-01201710.1155/2017/84307438430743The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 DroughtPaul X. Flanagan0Jeffrey B. Basara1Bradley G. Illston2Jason A. Otkin3School of Meteorology, University of Oklahoma, Norman, OK, USASchool of Meteorology, University of Oklahoma, Norman, OK, USAOklahoma Climatological Survey, Norman, OK, USACooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI, USAObservations from the Oklahoma Mesonet and high resolution Weather Research and Forecasting model simulations were used to evaluate the effect that the dry line and large-scale atmospheric patterns had on drought evolution during 2011. Mesonet observations showed that a “dry” and “wet” pattern developed across Oklahoma due to anomalous atmospheric patterns. The location of the dry line varied due to this “dry” and “wet” pattern, with the average dry line location around 1.5° longitude further to the east than climatology. Model simulations were used to further quantify the impact of variable surface conditions on dry line evolution and convective initiation (CI) during April and May 2011. Specifically, soil moisture conditions were altered to depict “wet” and “dry” conditions across the domain by replacing the soil moisture values by each soil category’s porosity or wilting point value. Overall, the strength of the dry line boundary, its position, and subsequent CI were dependent on the modification of soil moisture. The simulations demonstrated that modifying soil moisture impacted the nature of the dry line and showed that soil moisture conditions during the first half of the warm season modified the dry line pattern and influenced the evolution and perpetuation of drought over Oklahoma.http://dx.doi.org/10.1155/2017/8430743 |
| spellingShingle | Paul X. Flanagan Jeffrey B. Basara Bradley G. Illston Jason A. Otkin The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought Advances in Meteorology |
| title | The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought |
| title_full | The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought |
| title_fullStr | The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought |
| title_full_unstemmed | The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought |
| title_short | The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought |
| title_sort | effect of the dry line and convective initiation on drought evolution over oklahoma during the 2011 drought |
| url | http://dx.doi.org/10.1155/2017/8430743 |
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