LGR液态水同位素分析仪使用维护交流会胜利举行2011年3月11日,由中国科学院陆地水循环及地表过程重点实验室主办,理加联合科技有限公司协办的LGR液态水激光稳定同位素分析仪使用维护交流会在中国科学院北京地理所顺利举行。    来自中科院北京地理所,中科院生态中心,中科院东北地理所,中国林科院,北京林业大学,中国地质科学院岩溶所,清华大学,河北师范大学等11家单位的60余名代表出席了此次交流会。    中国科学院陆地水循环及地表过程重点实验室常务副主任,宋献方研究员为本次活动致开幕辞。宋老师是同位素水文学方面的专家,也是国内第一批激光稳定同位素仪器的使用者,他结合自己切身体会,谈到激光分析仪对研究者的重大帮助,也谈到由于是新的设备,研究者要在使用中与仪器供应商有更紧密的配合,以更大的发挥技术进步为科研工作带来的好处。这也正是重点实验室举办这样一个活动的目的。最后宋老师希望,所有的在用用户能结成一个网络,共同分享和交流使用经验。                                        随后,来自理加公司的朱湘宁经理,介绍了LGR液态水同位素分析仪自2007年在各个研究领域所做的代表性的研究工作。来自重点实验室的曹磊老师介绍了重点实验室针对仪器的维护规程。来自重点实验室的杨丽虎副研究员介绍了,针对高盐样品的前处理方法,并与感兴趣的研究人员就这个问题,展开了讨论。     最后理加公司李晓波经理详细的介绍了仪器的使用方法、维护方法和仪器数据分析与诊断等,以及相应的处理方法。    总的来说,这次活动达到了主办方的目的,增加了用户之间,用户和仪器供应商之间的交流,更及时的分享了使用和维护的经验。为更好的发挥这种新设备的性能做出了贡献。    此次会议的部分ppt,近期即可以在理加公司网站下载。
In Situ Measurements of Atmospheric Methane at Lake Untersee AntarcticaMethane (CH4) is an important greenhouse gas in the Earth's atmosphere accounting for approximately 20% of the observed greenhouse effect. With an atmospheric lifetime of about ten years methane levels have increased about 150% since pre-industrial times. It is increasingly important to monitor levels of major greenhouse gases in Earth's atmopshere including methane.While conducting research in a remote region of Antarctica (Lake Untersee -71.34??3.47? [Google Earth placemark] we monitored the local atmospheric levels of methane. Due to its remoteness and the absence of any significant local sources the Untersee Oasis region makes it a good location for obtaining a methane sample representative of the average value for the southern hemisphere.Our measurement using a very very sensitive methane analyzer made by Los Gatos Research Inc. yielded a value of 1.730 ppm which is in agreement with others who have made similar measurements around the world. Understanding sources and sinks for methane particularly as the Earth's atmosphere and oceans warm is very important as we try to better understand the role that humans play in global climate change.The images show Dale Andersen and Chris McKay monitoring the atmospheric methane levels at Lake Untersee in Antarctica in December 2008. Enlarged photos of [Dale and Chris] [Methane analyzer]Wikipedia: "Lake Untersee also known as Lake Unter-See is the largest surface freshwater lake in the interior of East Antarctica. It is approximately 6.5 km long and 2.5 km wide and permanently covered with ice with an average thickness of 3.0 m in summer. The lake is dammed by the Anuchin Glacier feeding the lake and has no outlet. Water is only lost through evaporation and ablation of the ice cover."
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