长江中下游六省大气甲烷柱浓度时空分布   总被引：2，自引：0，他引：2  

冯敏玉  张根  夏玲君  熊劦  李柏贞  孔萍  占明锦  张玉霞 《地球化学》2021,50(1):121-132

甲烷(CH4)是造成气候变暖的主要温室气体之一。为了了解长江中下游水稻种植区CH4浓度的分布情况,本次研究基于温室气体观测卫星(greenhouse gases observing satellite,GOSAT)和大气红外探测仪(atmospheric infrared sounder,AIRS)卫星反演的数据产品,对我国长江中下游六省大气CH4柱浓度的时空分布特征进行了研究。研究结果表明,由GOSAT反演的长江中下游六省大气CH4浓度呈逐年增长趋势,其年均浓度由2011年的1817×10^?9增长至2018年的1875×10^?9,高于东三省、华北平原和全国平均水平。区域平均年增长量为8.2×10^?9 a^?1。各省年际增长幅度略有差异,纬度偏低的江西、湖南和浙江三省大气CH4浓度高且增长量偏大,纬度偏高的湖北、安徽和江苏三省大气CH4浓度略低且增长量偏小。长江中下游六省大气CH4呈现较强的季节变化特征,湖北、湖南、江西和浙江峰值出现在9月,安徽、江苏峰值出现在8月。垂直方向上长江中下游六省CH4浓度随气压降低,浓度逐渐减小,呈现出明显的季节变化特征,近地面层GOSAT反演的最高值出现在夏季,最低值出现在春季;高层最高值出现在秋季,最低值出现在春季。AIRS反演的大气CH4浓度空间分布上北高南低,与GOSAT反演结果不一致,可能由于AIRS主要反映了对流层中层大气状况而GOSAT更多的反映了近地面层大气CH4的变化。其垂直方向上呈现高度越高,浓度越低,不同高度上秋季浓度均最高。  相似文献   

Effects of seismic force and pore water pressure on stability of 3D unsaturated hillslopes     

Wang  Long  Liu  Wenhua  Hu  Wei  Li  Wugang  Sun  De’an 《Natural Hazards》2021,105(2):2093-2116

Natural Hazards - Three-dimensional (3D) kinematic limit analysis of unsaturated hillslopes is presented in this paper. Different from the traditional two-dimensional (2D) mechanism based on the...  相似文献   

Search for Periodic Emission from Five Gamma-Ray Pulsars at the Frequency of 111 MHz     

Tyul’bashev  S. A.  Kitaeva  M. A.  Tyulbasheva  G. E. 《Astronomy Reports》2021,65(9):819-825

Astronomy Reports - The search for pulsar (periodic) radiation of five gamma-ray pulsars was carried out using the summed power spectra and summed periodograms. No harmonics corresponding to the...  相似文献   

Geoeffective Disturbances in the Solar Wind near the Solar Activity Minimum according to the Data of a Two-year Series of Observations of Interplanetary Scintillations with the BSA LPI Radio Telescope     

Chashei  I. V.  Lebedeva  T. O.  Tyul’bashev  S. A.  Subaev  I. A. 《Astronomy Reports》2021,65(11):1150-1169

Astronomy Reports - A joint analysis of the monitoring data of interplanetary scintillations with solar and geophysical data showed that at the descending phase of the 24 solar activity cycle, the...  相似文献   

Coexisting Tetrahedrite–(Zn) and Sphalerite at the Teremki Gold-Ore Deposit (East Transbaikalia): Chemical Composition and Formation Conditions     

Lyubimtseva  N. G.  Prokof’ev  V. Yu.  Bortnikov  N. S. 《Geology of Ore Deposits》2021,63(5):454-464

Geology of Ore Deposits - Paragenetic associations of tetrahedrite-(Zn) and sphalerite are distinguished in the Teremki gold-ore deposit. The chemical composition of coexisting minerals of this...  相似文献   

Causes and consequences of long-term groundwater overabstraction in Jordan     

Brückner  Florian  Bahls  Rebecca  Alqadi  Mohammad  Lindenmaier  Falk  Hamdan  Ibraheem  Alhiyari  Mohammad  Atieh  Ala’a 《Hydrogeology Journal》2021,29(8):2789-2802

Hydrogeology Journal - In 2017, a comprehensive review of groundwater resources in Jordan was carried out for the first time since 1995. The change in groundwater levels between 1995 and 2017 was...  相似文献   

Geochemical peculiarities of some rock-forming minerals during experimental modeling of shock metamorphism     

S. G. Skublov  V. I. Fel’dman  E. A. Kozlov 《Doklady Earth Sciences》2010,432(1):638-643

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Coastal observatory for long-term measurement and real time data processing of oceanological parameters     

S. A. Sviridov  N. A. Palshin  V. A. Solovyev  A. V. Zaretskiy  A. A. Metal’nikov 《Oceanology》2010,50(1):139-147

A coastal observatory for long-term continuous measurements of oceanological parameters and real-time data transfer via the Internet to remote users is described. The observatory was designed at the Shirshov Institute of Oceanology (SIO) and tested at its southern branch (SB) in the Black Sea. The architecture, components, and design principles of the observatory are discussed along with its application for solving problems of water dynamics in the coastal zone. Results of field tests are given.  相似文献   

Use of detrital foods and assimilation of nitrogen by coastal detritivores     

Charlene D’Avanzo  Ivan Valiela 《Estuaries and Coasts》1990,13(1):20-24

Two killifish common in east coast U.S.A. salt marshes,Cyprinodon variegatus Lacepede andFundulus heteroclitus Walbaum, differ in their ability to assimilate nitrogen from and grow on detritus.C. variegatus grew on a diet of detritus ofSpartina alterniflora Loisel, whileF. heteroclitus did not. In addition, when the fish were fed¹⁵N-labeledS. alterniflora detritus,¹⁵N:¹⁴N ratios inC. variegatus were higher than were ratios inF. heteroclitus. Therefore, even though both species ingest large amounts of detritus,C. variegatus makes more effective use of this portion of its diet. These dietary differences are corroborated by anatomical differences that suggest thatC. variegatus should make better use of detrital or plant tissues thanF. heteroclitus. In the label experiment, the degree of label in both fish was directly proportional to the degree of label in the food treatments. In previously published experiments designed to compare plant substrate with attached microbes as nitrogen sources for detritivores, %¹⁵N incorporated by a polychaete was also directly proportional to %¹⁵N in the detrital food. Therefore, it is difficult to distinguish between plant substrate and microbes as nitrogen sources for this detritivore.  相似文献   

Acid mine drainage contaminates groundwater of a Tennessee watershed     

Christopher J. O’Bara  R. Don Estes 《Environmental Geology》1985,7(3):159-161

Water samples were collected from 18 natural springs within the West Fork of the Obey River watershed. Overton County, Tennessee, to determine if groundwater was adversely affected by runoff from abandoned surface coal mines Six springs were found to be affected severely and deemed unfit as a source of potable water Water quality of the remaining springs was essentially unaffected it appeared that proximity to surface mines, elevation at the outflow, and geology of the surrounding strata determined the quality of the groundwater The unit is jointly supported by Tennessee Technological University, the Tennessee Wildlife Resource Agency, and the US. Fish and Wildlife Service  相似文献