Multiscale variability of streamflow in the Three Rivers Headwater Region, China, and links to large-scale atmospheric circulation indices

Increasing Trend ◽

Circulation Indices ◽

Three Rivers ◽

Abstract Exploring the relations between streamflow and large-scale atmospheric circulation systems can assist in identifying potentially useful indicators for the modeling of hydrological processes. With the help of ensemble empirical mode decomposition and the wavelet analysis method, this research explored streamflow variations and its links to large-scale atmospheric circulation indices during 1960–2012 in the Three Rivers Headwater Region (TRHR). A steady increasing trend was detected in the streamflow of the source region of Yangtze River (SYR), and a steady decreasing trend was detected in the streamflow of the source region of Lancang River (SLR). The streamflow of the source region of Yellow River (SYeR) had an increasing trend in the early years of the study period and subsequently exhibited a decreasing trend. The Tibetan Plateau monsoon (TPM), Arctic Oscillation (AO), and South Asia monsoon (SAM) are the key factors influencing streamflow changes in the SYR, SYeR, and SLR, respectively. At interannual time-scale variation with the period of about 3–9 years, an antiphase relationship exists between SYR streamflow and TPM indices, while in-phase relationships are detected between SYeR (SLR) streamflow and AO (SAM) indices.

Variability of large-scale atmospheric circulation indices for the northern hemisphere during the past 100 years

Meteorologische Zeitschrift ◽

10.1127/0941-2948/2009/0389 ◽

2009 ◽

Vol 18 (4) ◽

pp. 379-396 ◽

Cited By ~ 25

Author(s):

Stefan Brönnimann ◽

Alexander Stickler ◽

Thomas Griesser ◽

Andreas M. Fischer ◽

Andrea Grant ◽

...

Keyword(s):

Atmospheric Circulation ◽

Northern Hemisphere ◽

Large Scale ◽

The Past ◽

Circulation Indices ◽

Climate-driven Yield Variability for Winter Wheat in Henan Province, North China and its Relation to Large-scale Atmospheric Circulation Indices

International Journal of Plant Production ◽

10.1007/s42106-020-00119-z ◽

2020 ◽

Author(s):

Jiadong Chen ◽

Hongwei Tian ◽

Jin Huang ◽

Jinchi Zhang ◽

Fangmin Zhang

Keyword(s):

Winter Wheat ◽

Atmospheric Circulation ◽

Large Scale ◽

North China ◽

Henan Province ◽

Yield Variability ◽

Circulation Indices ◽

INFLUENCE OF LARGE-SCALE ATMOSPHERIC PROCESSES ON SEASONAL RUNOFF OF LARGE SIBERIAN RIVERS

Meteorologiya i Gidrologiya ◽

10.52002/0130-2906-2021-10-36-47 ◽

2021 ◽

pp. 36-47

Author(s):

L. N. VASILEVSKAYA ◽

◽

I. A. LISINA ◽

D. N. VASILEVSKII ◽

◽

...

Keyword(s):

Atmospheric Circulation ◽

River Runoff ◽

Large Scale ◽

Annual Runoff ◽

Spring Flood ◽

Rate Of Increase ◽

Circulation Indices ◽

Seasonal Runoff ◽

Kolyma River

Based on daily runoff volumes of four large Siberian rivers (the Ob, Yenisei, Lena, and Kolyma) for 1936-2018, the regime and changes in the total annual and seasonal runoff are analyzed. High synchronous and asynchronous correlations between monthly river runoff and atmospheric circulation indices of hemispheric and regional scales are revealed. In recent decades, the total annual runoff and its variations have increased (the rate of increase is most pronounced for the Kolyma River). A change in water content within a year is heterogeneous: weak positive trends are characteristic of the spring flood runoff and the summer-autumn period, and a significant increase occurred in the winter months. High correlations with a 1-8-month shift made it possible to identify the most informative regions, the atmospheric circulation over which makes a certain contribution to the variance of river runoff.

Large-scale atmospheric circulation control on stable water isotopes in precipitation over the northwestern and southeastern Tibetan Plateau

10.5194/acp-2016-876 ◽

2016 ◽

Cited By ~ 2

Author(s):

Xiaoxin Yang ◽

Sunil Acharya ◽

Tandong Yao

Keyword(s):

Tibetan Plateau ◽

Atmospheric Circulation ◽

Large Scale ◽

Southern Oscillation ◽

Asian Summer Monsoon ◽

The Tibetan Plateau ◽

Stable Water Isotopes ◽

South Asian Summer Monsoon ◽

Westerly Jet ◽

Abstract. The mid-latitude westerlies and South Asian Summer Monsoon (SASM) are two major atmospheric circulation systems influencing the Tibetan Plateau (TP). We report a seven-year (2007/2008–2013/2014) dataset of δ18O in precipitation (δ18Op) collected at three stations. Taxkorgan (TX) and Bulunkou (BLK) are located on the northwestern TP where westerly winds dominate while Lulang (LL) is situated on the southeastern TP where the SASM dominates. δ18O in precipitation (δ18Op) in northwestern TP varies with surface temperature (T) throughout the study period, and is depleted in 18O in precipitation during June to September when the monsoonal circulation enters the TP. Integration with model outputs suggests that large-scale atmospheric circulation plays a major role in isotopic seasonality in both regions. A teleconnection between precipitation on the northwestern TP and the El Niño-Southern Oscillation (ENSO) warm phase is suggested by changes in the relationship between δ18O and δD (e.g., reduced slope and weighted d-excess) in precipitation samples. These observations are indicative of a weakening of the mid-latitude westerly jet allowing local processes in the continental interior to become more dominant, thereby increasing the contribution of secondary evaporation from falling raindrops and kinetic fractionation. Under the conditions of a high Northern Annular Mode (NAM) the westerly jet is intensified over the southeastern TP which enhances local evaporation and continental recycling as revealed by a lower δD-δ18O slope and intercept, but higher d-excess average in contemporaneously collected precipitation samples. The significant correlation between T and δ18Op in the northwestern TP during various composite periods highlights a variation from 0.39 ‰ / ℃ (ENSO warm) to 0.77 ‰ / ℃ (high NAM), attributable to decreased (increased) water vapor availability over the northwestern TP during the ENSO warm (strong positive NAM) phase. ENSO cold and strong negative NAM phases show analogous effects on atmospheric circulation over both regions.

The main features of large-scale atmospheric circulation in the context of analyzing the consensus forecast of air temperature and precipitation for the 2020 Northern Eurasia summer

Hydrometeorological research and forecasting ◽

10.37162/2618-9631-2021-1-20-35 ◽

2021 ◽

pp. 20-35

Author(s):

R.M. Vilfand ◽

◽

K.A. Sumerova , ◽

V.A. Tishchenko ◽

V.M. Khan ◽

...

Keyword(s):

Atmospheric Circulation ◽

Air Temperature ◽

Large Scale ◽

Precipitation Forecast ◽

Northern Eurasia ◽

Temperature And Precipitation ◽

Skill Scores ◽

Circulation Indices ◽

Arctic Ice ◽

The main results of the analysis of the Northern Hemisphere large-scale atmospheric circulation features are presented for the 2020 summer. Skill scores of the consensus forecast for the 2020 Northern Eurasia summer are discussed in the context of analyzing the large-scale atmospheric circulation. The prognostic potential of the trend component in forecasting seasonal anomalies of air temperature and precipitation is noted. Keywords: air temperature, precipitation, forecast skill, trends, large-scale atmospheric circulation, sea surface temperature, NEACOF, circulation indices, Arctic ice

Multiscale Hydro-Meteorological Factors Variations and Its Links to Large-Scale Atmospheric Circulation Systems in the Source Region of Yangtze River

10.20944/preprints201810.0629.v1 ◽

2018 ◽

Author(s):

Jian Tang ◽

Hui-Qun Cao

Keyword(s):

Atmospheric Circulation ◽

Yangtze River ◽

Large Scale ◽

Meteorological Factors ◽

Source Region ◽

Reanalysis Data ◽

Sustainable Water Resources Management ◽

Circulation Characteristic ◽

Variation Characteristics ◽

Studying hydro-meteorological factors variations and its links to large-scale atmospheric circulation systems can facilitate the understanding of the hydrological processes and sustainable water resources management in the source region of the Yangtze River (SRYR). Currently, researches mostly focused on the temporal and spatial variation characteristics in hydro-meteorological factors; however, researches on the hydro-meteorological variations and its links to large-scale atmospheric circulation systems in the SRYR are scarce. Based on long-term hydro-meteorological and reanalysis data, this research investigated multiscale variations of hydro-meteorological factors and its links to large-scale atmospheric circulation characteristic indices during 1957~2012 in the SRYR. The results showed that the amounts of streamflows and precipitation in the SRYR declined during the 1990s. Since the 2000s, the amounts of streamflows and precipitation had increased significantly climate in the SRYR. The change trends of precipitation and streamflows in the SRYR are synergetic at annual and seasonal scales, and have three significant periods, namely 3~5 years, 15–20 years and 30–40 years. The South Asia monsoon (SAM) plays a relatively more important role in the hydro-meteorological factors changes in the SRYR. The relative contributions of SAM to streamflows and precipitation changes were 83.6% and 78%, respectively. During the driest (wettest) year, the SAM is relatively weak (strong), and brings less (more) southwest airflow into the SRYR, less (more) precipitation and streamflows will be generated in the SRYR.