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- From: Allen Bradley <abradley@phoenix.princeton.edu>
- Subject: OK Rainfall & Bermuda High
- Message-ID: <1993Jan27.190057.7827@Princeton.EDU>
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- X-Xxdate: Wed, 27 Jan 93 14:02:40 GMT
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- Organization: Princeton University; Water Resources Program
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- Date: Wed, 27 Jan 1993 19:00:57 GMT
- Lines: 48
-
- I came across an interesting observation on p. 452 of the National Water
- Summary 1988-89 (Floods & Droughts), U. S. Geological Survey Water Supply
- Paper 2375. It reads:
-
- "[A] large-scale feature in Oklahoma's precipitation delivery system is
- the
- Bermuda High. The Bermuda High ... is largely responsible for the warm
- and
- humid conditions that prevail in Texas and Oklahoma in summer ...
-
- The location of the Bermuda high-pressure system substantially affects
- late
- summer and fall rainfall. If the system is south of its normal location,
- polar airmasses can move southward into Oklahoma. Moisture from the Gulf
- of
- Mexico, and occasionally from decaying tropical cyclones, combines with
- southward-moving polar air to cause rainstorms ...
-
- If the Bermuda High occurs north and west of its normal location, drought
- can
- occur. The air is hot and humid, but the upper-air trough, along with
- disturbances necessary for the development of intense thunderstorms stays
- north of Oklahoma."
-
- After talking with the author, I learned that the above is based on
- observations by local (OK) meteorologists. Though all this seems very
- plausible, I would like to learn more. In particular, does anyone know
- of:
-
- 1. Literature on the relationship between rainfall in the Great Plains
- and
- the location of the Bermuda High?
-
- 2. Literature on the behavior of the Bermuda High ("normal" and
- anomalies)?
-
- 3. How I can get my hands on time series data for the summer/fall
- location of
- the Bermuda High so that I can check all this stuff out myself?
-
- ANY help would be appreciated.
-
- -- Allen
-
- ================================================================
- Allen Bradley (abradley@phoenix.princeton.edu)
- Water Resources Program
- Princeton University
-