2020-02-14 15:40:46.0 [tstevens] Remove Concepts delete narrower relation (null);
2013-03-13 16:34:53.0 [saritz] Insert Concept add narrower relation (Pacific Transition Index [233903dd-daec-474f-ac2e-cdcad84a85b5,83195] - PT [15f42cd5-9822-4769-be88-3efe64205ce0,83199]);
2013-03-13 16:27:15.0 [saritz] Insert Concept add broader relation (Pacific Transition Index [233903dd-daec-474f-ac2e-cdcad84a85b5,83195] - TELECONNECTIONS [b887d3e5-4280-43d2-a34e-0f63ac086b6a,61731]);
Pacific Transition Index
The Pacific Transition (PT) pattern is a leading mode during August and September. This pattern captures anomalous wave-train of 500-hPa heights extending from the central subtropical North Pacific to the eastern United States. The positive phase of the PT pattern features above-average heights west of Hawaii and across western North America, and below-average heights in the Gulf of Alaska and over the southeastern United States. The PT pattern is associated with above-average surface temperatures in the western subtropical North Pacific, the subtropical North Atlantic, and throughout western North America, and with below-average temperatures over the eastern half of the United States. The main precipitation departures associated with the PT pattern include above-average precipitation in the southeastern U.S., and below-average precipitation near Hawaii and across the northern tier of the United States.
TELECONNECTIONS