EFFECTS OF LAND USE CHANGES ON THE CARBON STORAGE OF TERRESTRIAL ECOSYSTEM——A CASE STUDY OF HULUN LAKE AND TAIHU LAKE BASINS

土地利用和覆被变化对陆地生态系统碳循环有着显著的影响,研究土地利用变化对陆地生态系统碳储量的影响,有利于揭示人类活动和气候变化对陆地生态系统碳循环的驱动机制,同时为制定合理的区域碳排放政策提供参考.本研究采用1980年、1995年、2000年和2005年4期遥感影像解译的土地利用数据,借助IPCC第四次报告推荐的计算方法和对应参数,选择我国东部亚热带和温带的两个典型大湖——太湖流域和呼伦湖流域1980～2005年碳收支情况进行估算,结果表明:1)1980～2005年太湖流域的土地利用结构变化主要表现为农田的逐年减少和聚居地的持续增长,而呼伦湖流域则主要表现为由于林地向草地的转化和草地向其他土地的转化所导致的林地面积的减少和其他土地面积的增加.2)在碳源/汇方面,太湖流域和呼伦湖流域均表现为碳汇,对于太湖流域来说,林地和农田是主要的碳汇,聚居地是碳支出的主要贡献者,2000年以来呼伦湖流域固碳能力出现比较明显的下降,林地和草地的变化是导致碳储量变化的主导因素.3)通过两个流域碳储量变化情况的比较,发现人类活动对陆地生态系统碳储量的影响较为显著;此外,植被类型差异以及成林时间也是影响固碳能力的主要原因.     

PALEOMAGNETIC STUDY OF IGNEOUS ROCKS OF GUPIS—SHAMRAN AREA,KOHISTAN ARC, PAKISTAN,NW HIMALAYA

Kohistan Sequence has been considered as island arc formed during the subduction of oceanic lithosphere at the leading edge of northward moving Indian continent.. Sedimentary sequences indicate that formation of the intra\|oceanic Kohistan arc began in early Cretaceous time. The isotopic data demonstrate the involvement of enriched, DUPAL type mantle, suggesting that Kohistan arc was formed at or south of the present equator (Khan et al., 1997). The Intra oceanic phase of Kohistan lasted until sometime between 102 and 85 Ma, when Kohistan collided with Asia. From this time until collision with India about 50 Ma ago, Kohistan existed as Andean\|type margin. This paleomagnetic study is from the volcanic and plutonic rocks exposed in Gupis\|Shamran area (west of Gilgit) in northern part of the Kohistan arc. According to geochronological data these rocks were formed 61～55Ma ago (Treloar et al., 1989), when Kohistan was existing as Andean\|type margin. Seven to nine samples were collected from nine sites of Shamran volcanics (58±1)Ma and from five sites of Pingal, Gupis, and Yasin plutons (Ar\|Ar hornblende ages ranges from 61～52Ma). On the basis of one Rb\|Sr age of (59±2)Ma from these plutons, the above\|mentioned Ar/Ar ages may be regarded as reasonable intrusion ages of these plutons (Searle, 1991).     

BULLETIN OF THE GEOLOGICAL SOCIETY OF CHINA——PROCEEDINGS OF THE EIGHTH ANNUAL MEETING OF THE GEOLOGICAL SOCIETY OF CHINA HELD IN NANKING,MAY 2,3,4,1931

The Annual Meetings of the past years were all held in Peiping. This was the first meeting held at Nanking at the invitation of National Central University. Fifty-four members were present, including Director W. H. Wong of the National Geological Survey, Prof. Y. C. Sun of National University, Peiping, Mr. T. O. Chu, acting Director of Geological Survey of Kwangtung and     

EDITORIAL——THE GEOLOGICAL SOCIETY OF CHINA HISTORY OF ORGANIZATION

Article Ⅰ.This society shall be known as The Geological Societyof China Article Ⅱ.The object of this society shall be the advancement ofgeology and its allied sciences.     

PROGRESSIVE TRANSFORMATION——THE THIBD MODE OF CLOSURE OF GEOSYNCLINES

笔者认为吉林省北部吉黑褶皱系,是属地槽封闭的第三种型式——递进式转化。本文就其基本特征进行了简述。     

THE PERMIAN SYSTEM OF THE NUJIANG—LANCANGJIANG—JINSHAJIANG AREA, SOUTHWESTERN CHINA

THE PERMIAN SYSTEM OF THE NUJIANG—LANCANGJIANG—JINSHAJIANG AREA, SOUTHWESTERN CHINA     

ON STUDIES OF THE DEFORMATION SYSTEM OF ROCK ENGINEERING——AN INTRODUCTION

１．ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｏｎｅｂａｓｉｓｏｆｅｎｇｉｎｅｅｒｉｎｇｄｅｓｉｇｎ,ｓｔｕｄｉｅｓｏｎｔｈｅｔｈｅｏｒｙａｎｄｍｅｔｈｏｄｏｆｄｅｆｏｒｍａｔｉｏｎｓ,ｆａｉｌｕｒｅｓａｎｄｓｔａｂｉｌｉｔｙｏｆｒｏｃｋｍａｓａｒｅｅｍｐｈａｔｉ...     

CONSTITUTION OF THE GEOLOGICAL SOCIETY OF CHINA——Revised and passed by the Eighth Annual Meeting May 1st,1931

Art.Ⅰ. This Society shall be known as the Geological Society of China. Art.Ⅱ. The object of this Society shall be the advancement of geology and its allied sciences. Art.Ⅲ. The membership of the Society shall consist of members, associates, corresponding members, and honorary members.     

STRUGGLE FOR CONTINUOUS DEVELOPMENT AND INNOVATION OF PALAEOGEOGRAPHY OF CHINA——STATEMENT FOR STARTING PUBLICATION OFTHE JOURNAL OF PALAEOGEOGRAPHY

1 Palaeogeography and Journal of Palaeogeography Palaeogeography is the science about the characteristics and evolution of natural geo-     

CENOZOIC BASIN EVOLUTION, STRUCTURAL STYLES OF THE QAIDAM AND AN ESTIMATE OF DENUDATION IN ADJACENT MOUNTAIN SYSTEMS, NORTHEAST QINGHAI—TIBETAN PLATEAU

CENOZOIC BASIN EVOLUTION, STRUCTURAL STYLES OF THE QAIDAM AND AN ESTIMATE OF DENUDATION IN ADJACENT MOUNTAIN SYSTEMS, NORTHEAST QINGHAI—TIBETAN PLATEAU     

GEODYNAMICS OF THE PAMIRS—HIMALAYA REGION

GEODYNAMICS OF THE PAMIRS—HIMALAYA REGION     

PRESENT LANDFORMS, ACTIVE TECTONIC ZONES, DEEP STRUCTURES AND UPLIFT MECHANISMS OF THE LONGSHOUSHAN BLOCK ON THE NORTHERN MARGIN OF THE QINGHAI—TIBET PLATEAU

PRESENT LANDFORMS, ACTIVE TECTONIC ZONES, DEEP STRUCTURES AND UPLIFT MECHANISMS OF THE LONGSHOUSHAN BLOCK ON THE NORTHERN MARGIN OF THE QINGHAI—TIBET PLATEAU     

THE "COPPER SHALE" OF MANSFIELD, GERMANY——A complex deposit of syngenetic and hydrothermal origin

Since about 1300 the Mansfield copper deposits have been the most produ-ctive copper-field in central Europe (Fig. 2). To give you a quantitative ideaabout ite importance I give in the following the production of metals per onemillion tons of handpicked ore in 1941:     

THE NUMERICAL SIMULATE OF THE UPLIFT PROCESS OF THE QINGHAI—TIBET PLATEAU

THE NUMERICAL SIMULATE OF THE UPLIFT PROCESS OF THE QINGHAI—TIBET PLATEAU     

GENESIS AND TYPES OF PEATLANDS,CHANGBAI MOUNTAINS,CHINA

ＧＥＮＥＳＩＳＡＮＤＴＹＰＥＳＯＦＰＥＡＴＬＡＮＤＳ，ＣＨＡＮＧＢＡＩＭＯＵＴＡＩＮＳ，ＣＨＩＮＡTXＧＥＮＥＳＩＳＡＮＤＴＹＰＥＳＯＦＰＥＡＴＬＡＮＤＳ，ＣＨＡＮＧＢＡＩＭＯＵＮＴＡＩＮＳ，ＣＨＩＮＡＷｕＣｈａｏｄｏｎｇＩｎｓｔｉｔｕｔｅｏｆＧｅｏｌ...     

GENETIC SEQUENCES OF GOLD DEPOSITS IN EPICONTINENTAL OROGENC MINERALIZATION ZONE——THE TECTONIC-METAMORPHIC-MINEROGENIC BELT IN THE AILAOSHAN MOUNTAINS,YUNNAN PROVINCE,CHINA

ＧＥＮＥＴＩＣＳＥＱＵＥＮＣＥＳＯＦＧＯＬＤＤＥＰＯＳＩＴＳＩＮＥＰＩＣＯＮＴＩＮＥＮＴＡＬＯＲＯＧＥＮＣＭＩＮＥＲＡＬＩＺＡＴＩＯＮＺＯＮＥ———ＴＨＥＴＥＣＴＯＮＩＣＭＥＴＡＭＯＲＰＨＩＣＭＩＮＥＲＯＧＥＮＩＣＢＥＬＴＩＮＴＨＥＡＩＬＡＯＳＨ...     

MICROSTRUCTURAL FEATURES OF DUCTILE SHEAR ZONE ON THE NORTHERN MARGIN OF HOHXIL,QING-HAI PROVINCE,CHINA

ＭＩＣＲＯＳＴＲＵＣＴＵＲＡＬＦＥＡＴＵＲＥＳＯＦＤＵＣＴＩＬＥＳＨＥＡＺＯＮＥＯＮＴＨＥＮＯＲＴＨＥＲＮＭＡＲＧＩＮＯＦＨＯＨＸＩＬ，ＱＩＮＧ－ＨＡＩＰＲＯＶＩＮＣＥ，ＣＨＩＮＡTXＭＩＣＲＯＳＴＲＵＣＴＵＲＡＬＦＥＡＴＵＲＥＳＯＦＤＵＣＴＩＬＥＳＨ...     

DIVISION and CORRELATION OF MIDDLE—UPPER PROTEROZOIC IN WESTERN SECTION OF MIDDLE QILIANSHAN

Qilianshan is the important mountain in Northwestern China,where theUpper Precambrian is well developed,in which especially in the westernsection of middle Qilianshan is extensive distributed,where the Upper Pre-cambrian succession iS complete in comparison,this is the important areafor researching into a geosyclinal type deposit of Middle—Late Proterozoicera.     

THE LATE QUATERNARY RIGHT LATERAL STRIKE-SLIPPING OF ZHONGDIAN—DAJU FAULT IN NORTHWEST YUNNAN, CHINA

THE LATE QUATERNARY RIGHT LATERAL STRIKE-SLIPPING OF ZHONGDIAN—DAJU FAULT IN NORTHWEST YUNNAN, CHINAthesubject“TherecentdisplacementandDynamicsoflithosphereintheQinghai XizangPlateau”ofnation alclimbingproject“Therecentdisp