Over the past 12 years N.Sharkhuu (retired from Institute of Geography, MAS) individually prepared most of permafrost monitoring boreholes in Mongolia, expanding from year to year and conducting permafrost monitoring of Mongolia within the framework of international CALM and GTN-P programs in close collaboration with F. Nelson and N. Shiklomanov from University of Delaware (with its fi nancial and data logger support) and with V. Romanovsky and K. Yoshikawa from University of Alaska Fairbanks (who recently supplied nine HOBO U12 dataloggers). At present, there are 44 CALM and GTN-P boreholes in Mongolia. 23 boreholes are equipped with temperature data loggers.

The Mongolian IPY Expression of Intent # 1129 is the main component of CALM and GTN-P programs in Mongolia, and is part of the IPA contribution to the Thermal State of Permafrost IPY Project 50.. This year’s investigations were the continuation of the activities described in Frozen Ground Number 31.

During three weeks in September Romanovsky, Yoshikawa, and N. Sharkhuu, conducted field investigations at almost all borehole sites in the Hovsgol, Hangai and Hentei mountainous regions, In the Hovsgol region we measured permafrost temperatures in 24 boreholes, including precise temperature measurements in three deep boreholes down to depths of 130- 200 m containing 50-150 m thick permafrost. In late May Sharkhuu drilled a 16 m deep borehole on Nalayh pingo top near Ulaanbaatar and collected 100 samples of pingo ice for Yoshikawa’s isotope analysis. We also plan to drill the 20 m high pingo top in the Hovsgol region, where artesian waters under 28 m thick massive ice (or at 32 m depth) was detected during borehole drilling in 1968.

In September, Y. Jambaljav, Institute of Geography, MAS, drilled nine, 10 m deep boreholes for permafrost monitoring in the Mongolian Altai and southern Hangai mountain regions. Based on N.Sharkhuu’s recommendation and old data, most of the drilled boreholes were located at locations where old boreholes were drilled and investigated 24-34 years ago. Ground temperature measurements in the boreholes are planned to start in August 2009. Soil temperature measurements in a series of mainly 2-3 m deep holes at Terelj and Nalayh observation sites near Ulaanbaatar have been running for the last six years within the cooperation framework between Japanese IORGC and Mongolian Institute of Geography.

N.Sharkhuu attended the NICOP in Fairbanks and represented Mongolia at the IPA Council meetings. The main results on TSP and CALM in Mongolia were presented at NICOP sessions and the CALM workshop. N. Sharkhuu wishes to express many thanks to Professor Larry D. Hinzman, director of IARC for sponsorship to attend the NICOP.

Natsagdorj Sharkhuu (sharkhuu_n@yahoo.com)