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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.
Ankhzaya Baatarbileg,Suk-Young Ko(고석영),June SaKong(사공준),Hoon Kwon(권훈),Gae-myoung Lee(이개명) 대한전기학회 2017 전기학회논문지 Vol.66 No.12
Both the introduction of the Renewable Energy Portfolio Standard (RPS) system into the electric energy market in 2012 and a decrease in the cost of constructing photovoltaic (PV) power plants have been increasing the number of MW PV plants in South Korea. Jeju Island is located at the center of three nations, South Korea, China and Japan, and its provincial government declared in 2012 that the island will be a clean region where greenhouse gases are not emitted by 2030. The Jeju provincial government is now doing its best to install PV plants and wind farms to realize a carbon-free island. In this study we investigated contribution of MW PV plants to the power of the electric grid during summer peak times on Jeju Island. Mt. Halla the highest mountain in South Korea, is located at the center of Jeju Island, and we divided the island into four regions and carried out analyses of a total of 24 PV plants. The average contribution of the PV plants in the respective region to electric power of Jeju Island during summer peak times was investigated and compared with those of the other regions. The best average contribution during the 12.5% maximum load period was obtained from the PV plants in the western region, and the value was 33% during 2015 and 2016.
Su-wan Kim,Ankhzaya Baatarbileg,Gae-myoung Lee 세계환경사회거버넌스학회 2016 World Environment and Island Studies Vol.6 No.3
The Jeju Special Self-Government Provincial Government made and has been working on the 'Carbon Free Island Jeju by 2030' Plan. Currently, it has been working on a plan of gradually penetrating (introducing) EVs to Jeju province to realize a carbon-free Jeju Island. In this paper, we made a model equation estimating the electrical energy consumed by EVs in a definite region, and then the number of EVs to be introduced every year according to the ‘penetrating EVs plan’ was estimated. Finally, the electrical energy consumed yearly for the next 10 years by the EVs was calculated.