2026-09-20T14:19:58Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/167662026-06-06T01:06:48Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Earle R. Williams.
Patel, Akash D. (Akash Chandu), 1977-
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Massachusetts Institute of Technology. Department of Mechanical Engineering
2005-05-19T14:31:09Z
2005-05-19T14:31:09Z
2001
2001
http://hdl.handle.net/1721.1/16766
49013647
Thesis (S.M. and S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
Includes bibliographical references (leaves 169-176).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Using a field station in Rhode Island, we record electromagnetic transients caused by global mesoscale lightning activity in the Schumann resonance band (3Hz-50Hz). For this thesis, mesoscale lightning flashes originating in Africa were analyzed and compared to the phase and amplitude of a five day global pressure wave and African easterly waves. Evidence was also presented for the mesoscale lightning to be correlated with African rainfall and kinetic energy. The five day global pressure wave was located in terms of phase and amplitude for every day of the years 1989, 1996, and 1998. This global pressure wave seems to have a certain phase relationship with African convection and could possibly be modulating rainfall and lightning by a factor of two. Evidence is also presented for the possible modulation of African easterly waves by the five day wave.
by Akash C. Patel.
S.M.
S.B.
176 leaves
2457231 bytes
2457031 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Mechanical Engineering.
Modulation of African lightning and rainfall by the global five day wave
Thesis
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<Abstract>Using a field station in Rhode Island, we record electromagnetic transients caused by global mesoscale lightning activity in the Schumann resonance band (3Hz-50Hz). For this thesis, mesoscale lightning flashes originating in Africa were analyzed and compared to the phase and amplitude of a five day global pressure wave and African easterly waves. Evidence was also presented for the mesoscale lightning to be correlated with African rainfall and kinetic energy. The five day global pressure wave was located in terms of phase and amplitude for every day of the years 1989, 1996, and 1998. This global pressure wave seems to have a certain phase relationship with African convection and could possibly be modulating rainfall and lightning by a factor of two. Evidence is also presented for the possible modulation of African easterly waves by the five day wave.</Abstract>
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