Multi-Scale Correlation between the Western U.S. Snow Water Equivalent and ENSO/PDO Using Wavelet Analyses

Tamaddun, Kazi Ali; Kalra, Ajay; Bernardez, M.; Ahmad, Sajjad

doi:10.1007/s11269-017-1659-9

Cited by 46 publications

(21 citation statements)

References 30 publications

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“…The coherence between the PC1 for ARB (PRB) and PRP was significant on the 2-8-year time scale from 1985 to 2011 with a phase difference from 0 • to 10 • (0 • to 45 • ) (Figure 10a,c). For this scale, the 10 • (45 • ) difference indicated that the influence of PRP on streamflows was recorded with 1-3 (3)(4)(5)(6)(7)(8)(9)(10)(11)(12) month lags, whereas 0 • indicated that both time series were simultaneously related. On the 10-14 (8)(9)(10)(11)(12)(13)(14) year decadal scale, the indices presented −45 • (0 • and 10 • ) phase difference, which implies that the influence of PRP on streamflows of ARB (PRB) was reflected within a 15-21 (3-5) month time interval.…”

Section: Wavelet Coherence and Phase Differencementioning

confidence: 99%

Streamflow Variability in Colombian Pacific Basins and Their Teleconnections with Climate Indices

Canchala

Cerón

Francés

et al. 2020

Water

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Oceanic-atmospheric phenomena of different time scales concurrently might affect the streamflow in several basins around the world. The Atrato River Basin (ARB) and Patía River Basin (PRB) of the Colombian Pacific region are examples of such basins. Nevertheless, the relations between the streamflows in the ARB and PRB and the oceanic-atmospheric factors have not been examined considering different temporal scales. Hence, this article studies the relations of the climate indices and the variability of the streamflows in the ARB and PRB at interannual and decadal timescales. To this, the streamflow variability modes were obtained from the principal component analysis (PCA); furthermore, their linear dependence with indices of the El Niño/Southern Oscillation (ENSO), precipitation (PRP), the Choco low-level jet (CJ), and other indices were quantified through (a) Pearson and Kendall’s tau correlations, and (b) wavelet transform. The PCA presented a single significant mode for each basin, with an explained variance of around 80%. The correlation analyses between the PC1s of the ARB and PRB, and the climate indices showed significant positive (negative) high correlations with PRP, CJ, and Southern Oscillation Index (SOI) (ENSO indices). The wavelet coherence analysis showed significant coherencies between ENSO and ARB: at interannual (2–7 years) and decadal scale (8–14), preferably with the sea surface temperature (SST) in the east and west Tropical Pacific Ocean (TPO). For PRB with the SST in the central and western regions of the TPO in the interannual (4–8 years) and decadal (8–14 years) scales, the decreases (increases) in streamflow precede the El Niño (La Niña) events. These results indicate multiscale relations between the basins’ streamflow and climate phenomena not documented in previous works, relevant to forecast the extreme flow events in the Colombian Pacific rivers and for planning and implementing strategies for the sustainable use of water resources in the basins studied.

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Section: Wavelet Coherence and Phase Differencementioning

confidence: 99%

Streamflow Variability in Colombian Pacific Basins and Their Teleconnections with Climate Indices

Canchala

Cerón

Francés

et al. 2020

Water

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“…Lag correlation analyses of various atmospheric and hydrological variables with SST indices have been extensively studied and often used for forecasts [61][62][63]. The correlations present additional details of teleconnections in different regions as an integral part of the global system, through interactions of atmospheric systems such as large-scale transport of air masses with various frequencies of waves [64,65] …”

Section: Lag Correlationsmentioning

confidence: 99%

Assessing the Pattern Differences between Satellite-Observed Upper Tropospheric Humidity and Total Column Water Vapor during Major El Niño Events

2018

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As part of the activities for the Global Energy and Water Exchanges (GEWEX) water vapor assessment project, the consistency of satellite-observed upper tropospheric humidity (UTH) and total column water vapor (TCWV) is examined. The examination is focused on their respective patterns during major El Niño events. The analysis shows that the two datasets, consisting of one measurement of vertically averaged relative humidity in the upper troposphere and one of absolute water vapor integrated over the atmospheric vertical column with dominant contribution from the lower troposphere, are consistent over the equatorial central-eastern Pacific, both showing increases of water vapor during major El Niño events as expected. However, the magnitude of drying in the TCWV field over the western Pacific is much weaker than that of moistening over the central-eastern Pacific, while the UTH field exhibits equivalent magnitude of drying and moistening. Furthermore, the drying in the UTH field covers larger areas in the tropics. The difference in their patterns results in an opposite phase in the time series during a major El Niño event when a tropical average is taken. Both UTH and TCWV are closely correlated with major climate indices. However, they have significantly different lag correlations with the Niño 3.4 index in both the sign (positive or negative) and lag time over tropical oceans.

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“…; Tamaddun et al. ). It is important to understand the relationship between climate variability and the hydrologic response of a basin such that sustainable and efficient management of water‐related systems can be implemented (Middelkoop et al.…”

Section: Introductionmentioning

confidence: 98%

“…ECB 2016-25 provisioned qualitative analysis of historical climate trends, as well as assessment of future projections. As the impacts of climate change to the hydrologic characteristics of a basin are realized, streamflow forecasting can become difficult for hydrologists and climatologists as past hydrologic conditions are no longer representative of future conditions (Pathak et al 2016;Thakali et al 2016;Tamaddun et al 2017). It is important to understand the relationship between climate variability and the hydrologic response of a basin such that sustainable and efficient management of water-related systems can be implemented (Middelkoop et al 2001;Pahl-Wostl 2007;Kundzewicz et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Streamflow Forecasting Using Singular Value Decomposition and Support Vector Machine for the Upper Rio Grande River Basin

Bhandari

Thakur

Kalra

et al. 2019

J American Water Resour Assoc

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The current study improves streamflow forecast lead‐time by coupling climate information in a data‐driven modeling framework. The spatial–temporal correlation between streamflow and oceanic–atmospheric variability represented by sea surface temperature (SST), 500‐mbar geopotential height (Z500), 500‐mbar specific humidity (SH500), and 500‐mbar east–west wind (U500) of the Pacific and the Atlantic Ocean is obtained through singular value decomposition (SVD). SVD significant regions are weighted using a nonparametric method and utilized as input in a support vector machine (SVM) framework. The Upper Rio Grande River Basin (URGRB) is selected to test the applicability of the proposed model for the period of 1965–2014. The April–August streamflow volume is forecasted using previous year climate variability, creating a lagged relationship of 1–13 months. SVD results showed the streamflow variability was better explained by SST and U500 as compared to Z500 and SH500. The SVM model showed satisfactory forecasting ability with best results achieved using a one‐month lead to forecast the following four‐month period. Overall, the SVM results showed excellent predictive ability with average correlation coefficient of 0.89 and Nash–Sutcliffe efficiency of 0.79. This study contributes toward identifying new SVD significant regions and improving streamflow forecast lead‐time of the URGRB.

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Multi-Scale Correlation between the Western U.S. Snow Water Equivalent and ENSO/PDO Using Wavelet Analyses

Cited by 46 publications

References 30 publications

Streamflow Variability in Colombian Pacific Basins and Their Teleconnections with Climate Indices

Streamflow Variability in Colombian Pacific Basins and Their Teleconnections with Climate Indices

Assessing the Pattern Differences between Satellite-Observed Upper Tropospheric Humidity and Total Column Water Vapor during Major El Niño Events

Streamflow Forecasting Using Singular Value Decomposition and Support Vector Machine for the Upper Rio Grande River Basin

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