3-year trends to February 2012

Parametric plots of smoothed climate variables at Manilla

“February 2012 very cold and wet”Trends to February 2012.

Recent partly-smoothed data points generally diverge rapidly from the near-neutral values of winter. February raw anomalies include extremely high rainfall and extremely low daily maximum and minimum temperatures.
Low humidity persists, marked by negative Dew Point anomalies, despite extreme rainfall and cloud cover.

Winter 2011 a time of trend reversal

Fully smoothed data points are now available for Winter 2011. Most variables show stable near-zero anomaly values at a time of trend reversal:
Max temp anomaly (x-axes, all graphs) had been rising since cold October 2010, but peaked in June 2011 while still negative.
Rainfall anomaly, which had reached a minimum just below zero in May, rose quite rapidly during the winter.
Cloudiness varied little around a minimum in July.
Uniquely, Dew Points were very low: the anomaly reached a new record low smoothed value of -1.70 degrees in July. This beat the drought year smoothed value of -1.48 degrees of September and October 2002.
Daily temperature range was slightly low and falling; so was daily minimum temperature. Subsoil temperature was slightly high and falling.

Note: Fully smoothed data – Gaussian smoothing with half-width 6 months – are plotted in red, partly smoothed data uncoloured, and raw data for the last data point in orange. January data points are marked by squares. Blue diamonds and the dashed blue rectangle show the extreme values in the fully smoothed data record since September 1999.

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