This is a proxy reconstruction of the TNH using the Climate Prediction Center's definition of the
The TNH is commonly measured by an index that is the difference between 500mb
geopotential height anomalies over western portions of the North Pacific Ocean (150°W to
130°W and 35°N to 55°N) and around Hudson Bay (100°W to 80°W and 45°N to 65°N). The index is called the
Tropical / Northern Hemisphere Teleconnection (TNH). This is simply a
reconstruction using spatial proxies that best represent the TNH teleconnection
related EOF within Mo and Livezey (1986).
Monthly Ascii Data 1948-Current(Standardized, 1981-2010 Climatology) is here @