Using stable isotopes to understand seasonal and interannual dynamics in moisture sources and atmospheric circulation in precipitation

2017 ◽  
Vol 31 (26) ◽  
pp. 4682-4692 ◽  
Author(s):  
Yu Tang ◽  
Xianfang Song ◽  
Yinghua Zhang ◽  
Dongmei Han ◽  
Likun Ai ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Atmospheric Circulation ◽  
Moisture Sources ◽  
Seasonal And Interannual Dynamics ◽  
Interannual Dynamics

Seasonal and Interannual Dynamics of Phytoplankton, Phytomicroepiphyton, and Nutrients Content in the River Section of the Kanev Reservoir

2016 ◽  
Vol 52 (1) ◽  
pp. 49-61 ◽  
Author(s):  
V. I. Shcherbak ◽  
V. M. Yakushin ◽  
A. M. Zadorozhnaya ◽  
N. Ye. Semenyuk ◽  
M. I. Linchuk
Keyword(s):  
River Section ◽  
Seasonal And Interannual Dynamics ◽  
Interannual Dynamics

Moisture sources and transport control year-round variations of stable isotopes in precipitation over Bangladesh

2020 ◽  
Author(s):  
Jing Gao ◽  
Mohammad Rubaiat Islam ◽  
Nasir Ahmed ◽  
Mohammad Masud Karim ◽  
Abdul Quaiyum Bhuiyan ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Moisture Sources ◽  
Transport Control

scholarly journals Giant dust particles at Nevado Illimani: a proxy of summertime deep convection over the Bolivian Altiplano

2021 ◽  
Vol 15 (3) ◽  
pp. 1383-1397
Author(s):  
Filipe G. L. Lindau ◽  
Jefferson C. Simões ◽  
Barbara Delmonte ◽  
Patrick Ginot ◽  
Giovanni Baccolo ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Stable Isotope ◽  
Atmospheric Circulation ◽  
Meteorological Data ◽  
Deep Convection ◽  
Relative Proportion ◽  
Dust Particles ◽  
Future Climate Change ◽  
Climate Change Scenarios ◽  
Convective Activity

Abstract. A deeper understanding of past atmospheric circulation variability in the Central Andes is a high-priority topic in paleoclimatology mainly because of the necessity to validate climate models used to predict future precipitation trends and to develop mitigation and/or adaptation strategies for future climate change scenarios in this region. Within this context, we here investigate an 18-year firn core drilled at Nevado Illimani in order to interpret its mineral dust record in relation to seasonal processes, in particular atmospheric circulation and deep convection. The core was dated by annual layer counting based on seasonal oscillations of dust, calcium, and stable isotopes. Geochemical and mineralogical data show that dust is regionally sourced in winter and summer. During austral summer (wet season), an increase in the relative proportion of giant dust particles (∅>20 µm) is observed, in association with oscillations of stable isotope records (δD, δ18O). It seems that at Nevado Illimani both the deposition of dust and the isotopic signature of precipitation are influenced by atmospheric deep convection, which is also related to the total amount of precipitation in the area. This hypothesis is corroborated by regional meteorological data. The interpretation of giant particle and stable isotope records suggests that downdrafts due to convective activity promote turbulent conditions capable of suspending giant particles in the vicinity of Nevado Illimani. Giant particles and stable isotopes, when considered together, can be therefore used as a new proxy for obtaining information about deep convective activity in the past.

scholarly journals Flux partitioning in an old-growth forest: seasonal and interannual dynamics

2008 ◽  
Vol 28 (4) ◽  
pp. 509-520 ◽  
Author(s):  
M. Falk ◽  
S. Wharton ◽  
M. Schroeder ◽  
S. Ustin ◽  
K. T. P. U
Keyword(s):  
Old Growth ◽  
Old Growth Forest ◽  
Seasonal And Interannual Dynamics ◽  
Flux Partitioning ◽  
Interannual Dynamics

Seasonal and interannual dynamics in diatom production in the Cariaco Basin, Venezuela

2009 ◽  
Vol 56 (4) ◽  
pp. 571-581 ◽  
Author(s):  
Oscar E. Romero ◽  
Robert C. Thunell ◽  
Yrene Astor ◽  
Ramon Varela
Keyword(s):  
Cariaco Basin ◽  
Seasonal And Interannual Dynamics ◽  
Interannual Dynamics

scholarly journals Isótopos Estáveis e Química Iônica da Cobertura Glacial da Ilha do Rei George (Shetlands do Sul, Antártica) como Indicadores de Parâmetros Ambientais

2001 ◽  
Vol 28 (2) ◽  
pp. 343
Author(s):  
FRANCISCO ADOLFO FERRON ◽  
RONALDO TORMA BERNARDO ◽  
JEFFERSON CARDIA SIMÕES
Keyword(s):  
Stable Isotopes ◽  
Chemical Composition ◽  
Atmospheric Circulation ◽  
Environmental Parameters ◽  
King George Island ◽  
Ice Cap ◽  
Oxygen Stable Isotopes ◽  
Ice Pack ◽  
Snow And Ice

Hydrogen and oxygen stable isotopes and anionic concentration (sulphates, chlorides and nitrates) in snow and ice from King George Island are presented. Isotopic and chemical composition are preserved in the uppermost part of the ice cap (first meters) providing informations about some environmental parameters as the origin of precipitation and particles (impurities) e its distribution, atmospheric circulation and the physics processes occurring in the ice pack.

scholarly journals Spatiotemporal Variation of Hydrogen and Oxygen Stable Isotopes in the Yarlung Tsangpo River Basin, Southern Tibetan Plateau

2021 ◽  
Vol 9 ◽  
Author(s):  
Ya-Ni Yan ◽  
Jun-Wen Zhang ◽  
Wei Zhang ◽  
Gui-Shan Zhang ◽  
Jian-Yang Guo ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Surface Water ◽  
River Water ◽  
Water Cycle ◽  
Flow Direction ◽  
Spatiotemporal Variation ◽  
Altitude Effect ◽  
Moisture Sources ◽  
Yarlung Tsangpo ◽  
Yarlung Tsangpo River

Characterization of spatiotemporal variation of the stable isotopes δ18O and δD in surface water is essential to trace the water cycle, indicate moisture sources, and reconstruct paleoaltimetry. In this study, river water, rainwater, and groundwater samples were collected in the Yarlung Tsangpo River (YTR) Basin before (BM) and after the monsoon precipitation (AM) to investigate the δ18O and δD spatiotemporal variation of natural water. Most of the river waters are distributed along GMWL and the line of d-excess = 10‰, indicating that they are mainly originated from precipitation. Temporally, the δ18O and δD of river water are higher in BM series (SWL: δD = 10.26δ18O+43.01, R2 = 0.98) than AM series (SWL: δD = 9.10δ18O + 26.73, R2 = 0.82). Spatially, the isotopic compositions of tributaries increase gradually from west to east (BM: δ18O = 0.65Lon (°)-73.89, R2 = 0.79; AM: δ18O = 0.45Lon (°)-57.81, R2 = 0.70) and from high altitude to low (BM: δ18O = −0.0025Alt(m)-73.89, R2 = 0.66; AM: δ18O = −0.0018Alt(m)-10.57, R2 = 0.58), which conforms to the “continent effect” and “altitude effect” of precipitation. In the lower reaches of the mainstream, rainwater is the main source, so the variations of δ18O and δD are normally elevated with the flow direction. Anomalously, in the middle reaches, the δ18Omainstream and δDmainstream values firstly increase and then decrease. From the Saga to Lhaze section, the higher positive values of δ18Omainstream are mainly caused by groundwater afflux, which has high δ18O and low d-excess values. The δ18Omainstream decrease from the Lhaze to Qushui section is attributed to the combined action of the import of depleted 18O and D groundwater and tributaries. Therefore, because of the recharge of groundwater with markedly different δ18O and δD values, the mainstream no longer simply inherits the isotopic composition from precipitation. These results suggest that in the YTR Basin, if the δ18O value of surface water is used to trace moisture sources or reconstruct the paleoaltimetry, it is necessary to rule out the influence from groundwater.

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