How changes of groundwater level affect the desert riparian forest ecosystem in the Ejina Oasis,Northwest China     

HaiYang Xi  JingTian Zhang  Qi Feng  Lu Zhang  JianHua Si  TengFei Yu 《寒旱区科学》2019,11(1):62-80

Groundwater is a key factor controlling the growth of vegetation in desert riparian systems. It is important to recognise how groundwater changes affect the riparian forest ecosystem. This information will not only help us to understand the ecological and hydrological process of the riparian forest but also provide support for ecological recovery of riparian forests and water-resources management of arid inland river basins. This study aims to estimate the suitability of the Water Vegetation Energy and Solute Modelling(WAVES) model to simulate the Ejina Desert riparian forest ecosystem changes,China, to assess effects of groundwater-depth change on the canopy leaf area index(LAI) and water budgets, and to ascertain the suitable groundwater depth for preserving the stability and structure of desert riparian forest. Results demonstrated that the WAVES model can simulate changes to ecological and hydrological processes. The annual mean water consumption of a Tamarix chinensis riparian forest was less than that of a Populus euphratica riparian forest, and the canopy LAI of the desert riparian forest should increase as groundwater depth decreases. Groundwater changes could significantly influence water budgets for T. chinensis and P. euphratica riparian forests and show the positive and negative effects on vegetation growth and water budgets of riparian forests. Maintaining the annual mean groundwater depth at around 1.7-2.7 m is critical for healthy riparian forest growth. This study highlights the importance of considering groundwater-change impacts on desert riparian vegetation and water-balance applications in ecological restoration and efficient water-resource management in the Heihe River Basin.  相似文献   

Subpollen Particles as Atmospheric Cloud Condensation Nuclei     

Mikhailov  E. F.  Ivanova  O. A.  Nebosko  E. Yu.  Vlasenko  S. S.  Ryshkevich  T. I. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(4):357-364

Izvestiya, Atmospheric and Oceanic Physics - Bioparticles constitute a significant fraction of atmospheric aerosol. Their size range varies from nanometers (macromolecules) to hundreds of...  相似文献   

Dissipation Rate of Turbulence in a Water Layer under Wind Waves Based on Data of a Laboratory Experiment     

Polnikov  V. G.  Baidakov  G. A.  Troitskaya  Yu. I. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(5):492-501

Izvestiya, Atmospheric and Oceanic Physics - The aim of this work is to obtain estimates and parameterization of the dissipation rate of the turbulence kinetic energy (TKE dissipation), ε,...  相似文献   

Tsunami Hazard Assessment on the Egyptian Coast of the Mediterranean     

Zaytsev  A. I.  Babeyko  A. Yu.  Kurkin  A. A.  Yalciner  A. C.  Pelinovsky  E. N. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(5):462-469

Izvestiya, Atmospheric and Oceanic Physics - Tsunami forecast possibilities for areas with a small base of historical tsunamis have been discussed using the Probabilistic Tsunami Hazard Assessment...  相似文献   

Influx of Streaming Methane into Anoxic Waters of the Black Sea Basin     

Artemov  Yu. G.  Egorov  V. N.  Gulin  S. B. 《Oceanology》2019,59(6):860-870

Oceanology - Based on long-term data on the spatial distribution and fluxes of streaming (bubbling) methane in the Black Sea, the study considers various types of streaming gas emissions...  相似文献   

A Mesocyclone over the Northern Sea of Japan in February 2013     

Potalova  E. Yu.  Kleshcheva  T. I.  Permyakov  M. S. 《Oceanology》2019,59(6):814-822

Oceanology - The article considers a particular event in the influence of a mesoscale cyclone (MC) on the northern Sea of Japan on February 10–11, 2013. The passage of the MC was accompanied...  相似文献   

Numerical Study on Tidal Mixing in the Bohai Sea     

Yifei Zhao  Ting Yu  Hu Wang 《Marine Geodesy》2019,42(1):46-63

The spatial and temporal variability of tidal mixing in Bohai Sea is studied using a numerical approach. In calculating tidal mixing, accurate barotropic tidal current is obtained via a harmonic analysis package utilizing the simulated current output from a high-resolution regional ocean model. And a “small-scale” roughness map is adopted to describe the detailed topographic features of Bohai Sea. It is shown that the tidal mixing estimated in Bohai Sea is much higher than the level of global background, and fluctuates considerably at some regions within a single day. In Liaodong Bay, Bohai Bay and Bohai Strait, the mixing varies greatly, with the peak value of O (10^?2) m² s^?1. The order of magnitude of mixing in Laizhou Bay is about O (10^?5～10^?3) m² s^?1. Mixing with background level of O (10^?5) m² s^?1 only appears in central area. Result also shows that rough topography plays relatively a more important role than tidal current in enhancing diapycnal mixing in Bohai Sea. The distributions of tidal mixing in selected sections reveal that the vertical stratification in Bohai Sea is not obvious, generally renders a barotropic structure.  相似文献   

Atmospheric Loading Displacements     

Spiridonov  E. A.  Vinogradova  O. Yu. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(11):1814-1819

Izvestiya, Atmospheric and Oceanic Physics - A method for calculating of the Earth’s surface displacements due to atmospheric loading effect is presented. The load displacements are...  相似文献   

Evolution of the Fine Structure of the Matter Distribution of a Free-Falling Droplet in Mixing Liquids     

Chashechkin  Yu. D. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(3):285-294

Izvestiya, Atmospheric and Oceanic Physics - In this paper we study the evolution of the matter distribution pattern of ink droplets falling freely into calm water and forming a cumulative back jet...  相似文献   

Applied Aspects of Different Frequency Bands of Seismic and Water Acoustic Investigations on the Shelf     

Ampilov  Yu. P.  Terekhina  Ya. E.  Tokarev  M. Yu. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(7):705-720

Izvestiya, Atmospheric and Oceanic Physics - This article focuses on the study of the information value of offshore technologies based on the generation of acoustic signals in water in a wide...  相似文献