Rossby waves are waves in potential vorticity that propagate along the extratropical tropopause and can be impacted by the
advection of low-PV air originating from the subtropics. In this study, the subtropical precipitation influence on the extratropical
Rossby wave activity during the Atlantic winter season is investigated for a ten year period. Using both TRMM and TIGGE 12-Hr forecasted
precipitation data, heavy precipitation events were identified near the footprints regions of warm conveyor belts in the northern
Atlantic, specifically in the Gulf of Mexico and Bermuda region. The extratropical Rossby waves were then analyzed using PV on a 320K
surface. By use of wavelet transforms, the amplitude of the Rossby waves were analyzed as a function of wavelength and longitude. The
interaction between a single heavy precipitation event and the extratropical Rossby waves was examined for the days preceding and the week
following the event. A climatological analysis of heavy precipitation events was conducted on the winter seasons from 2006 - 2015. Case
study and climatological analysis identified the following: A ridge in the Northern Atlantic undergoes amplification downstream of the
heavy precipitation event in the days following the event. A southerly flow, likely associated with a warm conveyor belt, connects the
region of the heavy precipitation event and the extratropical tropopause. The interaction was most prominent during the late winter season
and during the heaviest of precipitation events. The teleconnection identified in this study highlights a mechanism by which cloud-scale
subtropical precipitation is connected to synoptic scale extratropical dynamics in the Atlantic. / A Thesis submitted to the Department of Earth, Ocean, and Atmospheric Science in partial fulfillment
of the requirements for the degree of Master of Science. / Fall Semester 2016. / November 17, 2016. / Potential Vorticity, Rossby Waves, Subtropical Precipitation, Teleconnection / Includes bibliographical references. / Jeffrey Chagnon, Professor Directing Thesis; Robert Hart, Committee Member; Philip Sura, Committee
Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_405569 |
| Contributors | Cruz, Antonio DeJesus (authoraut), Chagnon, Jeffrey M. (professor directing thesis), Hart, Robert E. (Robert Edward), 1972- (committee member), Sura, Philip (committee member), Florida State University (degree granting institution), College of Arts and Sciences (degree granting college), Department of Earth, Ocean, and Atmospheric Science (degree granting departmentdgg) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource (44 pages), computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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