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HOME >Climate System Monitoring > Monthly Highlights on the Climate System

Monthly Highlights on the Climate System

'Monthly Highlights on the Climate System' has been issued in PDF format since March 2007 as a monthly bulletin focusing on the monthly highlights of the monitoring results.

Highlights in October 2019

- Monthly mean temperatures were significantly above normal from northern to western Japan.
- Monthly precipitation amounts were significantly above normal on the Pacific side of northern Japan and in eastern Japan.
- Monthly mean temperatures were extremely high from the southern part of Eastern Siberia to western Japan, from southwestern Russia to southern Europe, in the Arabian Peninsula, from Mauritius to South Africa, from the eastern USA to southern Mexico, and from southeastern to western Australia.
- In the equatorial Pacific, remarkably positive SST anomalies were observed in the western part.
- Convective activity was enhanced over the latitude band of 10ºN in Africa and the northwestern Indian Ocean, and was suppressed from the northern part of the Bay of Bengal to the seas east of the Philippines, over the central to eastern part of the southern equatorial Indian Ocean, and over the tropical North Atlantic.
- In the 500-hPa height field, positive anomalies were seen over the seas southwest of the Kamchatka Peninsula and the seas south of Alaska, and from Greenland to eastern Canada, and negative anomalies were seen over the central part of North America and over northern Europe.
- The westerly jet stream shifted northward from its normal position over Japan.

Full version (PDF)

The descriptions until April 2011 are based on the old normal (i.e., the 1979 - 2004 average).
The descriptions until January 2014 are based on the JRA-25/JCDAS datasets.

Figures and Tables

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Tokyo Climate Center, Climate Prediction Division, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, Japan.
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