Global Warming Detected by Tree Rings from Mongolia

Nachin, Baatarbileg,Jacoby, Gordon C. Korea Association For Quaternary Research 2003 제사기학회지 Vol.17 No.2

In the year 2000 we culminated a successful five year investigation of climate change by completing a preliminary east-west transect across Mongolia. An earlier tree-ring study at Tarvagatay Pass, Mongolia indicated unusual warming during the 20th century similar to other paleo-investigations of the northern hemisphere. This record had represented one of the few tree-ring records for central Asia. New data from several sites in western Mongolia confirmed the preliminary temperature. The highest twenty-year growth period for the composite record is from 1973-1994. The western Mongolian record was significantly correlated with the Taimyr Peninsula and two northern hemisphere temperature reconstructions reflecting large-scale temperature patterns while showing some important regional differences. These differences should prove useful for climate models. We have also developed a millennial length temperature-sensitive record at the Solongotyin Davaa site (formerly Tarvagatay Pass) using relict wood and living trees. Conspicuous features over the last 1000 years are a century scale temperature decline punctuated by the end of the Little Ice Age in the late-1800s and 20th century warming. The record also shows a cold period early in the 12th century and warm intervals late in the 10th, early in the 15th and at end of the 18th centuries. Despite a limited sample size before 900 AD, the long Solongotyin Davaa record is useful in indicating severe cold events and suggests some cold intervals nearly as severe. These tree ring series, spanning much of the circumpolar northern treeline, have been compiled to create a long-term reconstruction of the Earth's temperature over centuries. The new chronology, in addition to its value as a detailed record of Mongolian climate, provides independent corroboration for such hemispheric and global reconstructions and their indications of unusual warming during the 20th century.

Design and Development of Network for Housing Estate Security System

Awacharin Nachin,Somsak Mitatha,Kobchai Dejhan,Patchanon Kirdpipat,Yoshikazu Miyanaga 제어로봇시스템학회 2003 제어로봇시스템학회 국제학술대회 논문집 Vol.2003 No.10

Biomass Estimation of Common Tree Species of Mongolia

Badarch, Sambuu,Nachin, Baatarbileg Korea Association For Quaternary Research 2003 제사기학회지 Vol.17 No.2

Trends in international investment flows : Foreign direct investment in Mongolia

Ganzorig, Baasankhuu,Nachin, Dashnyam 정석물류통상연구원 2006 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.4 No.2

Despite the worldwide stagnation in FDI, interest in Mongolia on the part of foreign investors, especially those from East Asia and North America, has grown over the last few years, mainly in the mining, trade and service sectors. The increase of FDI into Mongolia can be linked with the Mongolian government's efforts to establish a more favorable external and internal legal environment in order to provide a free and open regime for business, the shifting tendency of world market center from traditional Europe, America to Asia, namely to China, resolving the "big debt" issue between Mongolia and Russian Federation which open new favorable opportunities for intensification of foreign investment inflows, increased domestic private savings and lastly Mongolia's GDP steady growth rate during last years. The purpose of this paper is to review FDI inflows into Mongolia, detailing the sectors benefiting from this investment and the countries where it originates, based on information gathered in the period up to 2005.

Trends in international investment flows

Baasankhuu Ganzoring,Dashnyam Nachin 인하대학교 정석물류통상연구원 2006 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.4 No.2

Allometric equations for the estimation of above- and below-ground biomass for Larix sibirica Ledeb. in Northern Mongolia

Sukhbaatar Gerelbaatar,Chimednyam Dorjsuren,Nachin Baatarbileg,Ganbaatar Batsaikhan,Gradel Alexander 한국산림과학회 2023 Forest Science And Technology Vol.19 No.1

The accurate estimation of tree above-ground (AGB) and below-ground (BGB) biomass components and their root/shoot ratio play key roles in stand and country-level forest biomass and carbon stock estimation. Nevertheless, site-specific and appropriate biomass equations and root/shoot ratio are hardly available for natural larch (Larix sibirica Ledeb.) forests in Mongolia. The present study aimed (1) to develop allometric equations to estimate the above- and below-ground biomass of L. sibirica trees, and (2) to estimate the root/shoot ratio applicable for estimating the root biomass based on above-ground biomass of natural larch forests in northern Mongolia. A total of 40 trees with DBH ranging from 6.8 to 40.8 cm were sampled for tree biomass analyses. For each biomass component, we calculated the proportion of biomass allocated to different components, and also tested four allometric equations based on diameter at breast height (DBH) and height (H) as independent variables. Our results, based on measurements of oven-dried biomass, revealed that stem biomass on average accounted for 44.5% and followed by branch (28.6%) and root (19.9%) biomass, respectively. Stem and branch biomass proportions were gradually increased with increasing DBH, while a contrary trend was observed for needles. The root/shoot ratio averaged 0.25. A comparison of the allocation of root biomass by diameter fractions showed an ever-growing trend of coarse roots with an increase in stem diameter, which often exceeded more than 50% of the total root biomass. However, biomass equations, which include both DBH and H were more precise than equations that are solely based only on DBH. Consequently, among the proposed allometric regression models for estimating the AGB and BGB, the equation y ¼ aDbHc was selected as the best-fitted equation for estimating each biomass component in Siberian larch forests. These allometric equations are available to be used for the estimation of natural larch forest biomass and carbon stocks in the Khentii Mountains of Mongolia, where extreme continental climate conditions dominate.

Trends in international investment flows:Foreign direct investment in Mongolia

Baasankhuu Ganzorig,Dashnyam Nachin 인하대학교 정석물류통상연구원 2006 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.4 No.2

Despite the worldwide stagnation in FDI, interest in Mongolia on the part of foreign investors, especially those from East Asia, North America, has grown over the last few years, mainly in the mining, trade and service sectors. The increase of FDI into Mongolia can be linked with the Mongolian government’s efforts to establish a more favorable external and internal legal environment in order to provide a free and open regime for business, the shifting tendency of world market center from traditional Europe, America to Asia, namely to China, resolving the "big debt" issue between Mongolia and Russian Federation which open new favorable opportunities for intensification of foreign investment inflows, increased domestic private savings and lastly Mongolia’s GDP steady growth rate during last years. The purpose of this paper is to review FDI inflows into Mongolia, detailing the sectors benefiting from this investment and the countries where it originates, based on information gathered in the period up to 2005.

Temperature Fluctuations Over the Past 2000 Years in Western Mongolia

Pederson, Neil,Jacoby, Gordon C.,D′Arrigo, Rosanne.,Frank, David,Buckley, Brendan,Nachin, Baatarbileg,Chultem, Dugarjav,Renchin, Mijiddorj Korea Association For Quaternary Research 2003 제사기학회지 Vol.17 No.2

Much of northern Asia is lacking in high-resolution palaeoclimatic data coverage. This vast region thus represents a sizeable gap in data sets used to reconstruct hemispheric-scale temperature trends for the past millennium. To improve coverage, we present a regional-scale composite of four tree-ring width records of Siberian pine and Siberian larch from temperature-sensitive alpine timber-line sites in Mongolia. The chronologies load closely in principal components analysis (PCA) with the first eigenvector accounting for over 53% of the variance from ad 1450 to 1998. The 20-year interval from 1974 to 1993 is the highest such growth period in this composite record, and 17 of the 20 highest growth years have occurred since 1946. Thus these trees, unlike those recently described at some northern sites, do not appear to have lost their temperature sensitivity, and suggest that recent decades have been some of the warmest in the past 500 years for this region. There are, however, comparable periods of inferred, local warmth for individual sites, e.g., in 1520-1580 and 1760-1790. The percent common variance between chronologies has increased through time and is highest (66.1%) in the present century. Although there are obvious differences among the individual chronologies, this result suggests a coherent signal which we consider to be related to temperature. The PCA scores show trends which strongly resemble those seen in recent temperature reconstructions for the Northern Hemisphere, very few of which included representation from Eurasia east of the Ural Mountains. The Mongolia series therefore provides independent corroboration for these reconstructions and their indications of unusual wanning during the twentieth century.