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

Seasonal Highlights on the Climate System

'Seasonal Highlights' has been issued in PDF format since spring 2007 as a seasonal bulletin focusing on the seasonal highlights of the monitoring results. For monthly information, please refer to 'Monthly Highlights on the Climate System.'

Highlights in Winter (December 2019 - February 2020)

- The seasonal anomaly of the average temperature over Japan was the warmest for winter since 1897/1898.
- Seasonal mean temperatures were the highest on record for winter since 1946/1947 in eastern and western Japan. Seasonal snowfall amounts were the least on record for winter since 1961/1962 on the Sea of Japan side of northern and eastern Japan.
- Seasonal mean temperatures were extremely high from eastern Japan to central China, from Central Siberia to eastern Europe, from central to southwestern Europe, from the southeastern part of North America to the northwestern part of South America, and in Australia.
- In the equatorial Pacific, remarkably positive SST anomalies were observed in the western part.
- Convective activity was enhanced over the western tropical Indian Ocean, around the date line in the equatorial Pacific, and over the latitude band of 10ºN in the central tropical North Pacific, and suppressed over the Maritime Continent.
- In the 500-hPa height field, positive anomalies were seen over Japan, the mid-latitudes in the central and eastern North Pacific, and southern Europe, and negative anomalies were seen over Alaska and near Iceland.
- The westerly jet stream shifted southward from its normal position from northern South Asia to southern China, and meandered northward over the mid-latitudes in the western North Pacific.

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