NH mean and anomaly 300-hPa geopotential heights for 1 June – 28 Aug 2018 (posted 30 August 2018):

 

Hi all,

 

To follow up on a point made in Atm 601 class on 30 Aug about a poleward-shifted jet in a warming climate, appended are maps of the mean and anomaly 300-hPa geopotential heights for the NH for 1 June – 28 Aug 2018.  The 300-hPa heights are anomalously high almost everywhere in the higher midlatitude regions of the NH.  At the same, the 300-hPa heights are anomalously low across much of the Arctic Ocean.  This 300-hPa mean and anomaly height field pattern is consistent with a poleward-shifted jet stream and anomalous warmth across middle latitude regions.  Evidence for this anomalous warmth can be found in the appended maps of mean and anomaly 850-hPa temperatures for the NH for 1 June to 28 Aug 2018. 

 

Lance