Shifting covariability of North American summer monsoon precipitation with antecedent winter precipitation

McCabe, Gregory J.; Clark, Martyn P.

doi:10.1002/joc.1304

Cited by 11 publications

(10 citation statements)

References 16 publications

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“…A PDO and SOI time series developed through similar techniques is presented in Figure 8. McCabe and Clark (2006) indicate that PDO and AMO are also important teleconnections for regional precipitation. Following the seasonalities described in section 3.1.3 above the AMO, PDO and ENSO indices are utilized to deconstruct Comal Springs flow for quantifying relative contributions to discharge.…”

Section: Teleconnectionsmentioning

confidence: 98%

Discharge variability for an artesian spring of the Edwards Aquifer: Comal Springs (1933–2007)

Cox

Meng

Khedun

et al. 2009

Intl Journal of Climatology

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Daily discharge volumes of Comal Springs, the largest artesian spring of the Edwards Aquifer (EA) in Central Texas, were utilized to characterize the flow of Comal Springs for the period of record spanning . The influence of water extraction (pumping) on discharge characteristics during the record was examined and found to be statistically significant for both volume and variability of spring discharge (p < 0.01). Pumping explains approximately a quarter of the variation in annual discharge (r 2 = 0.25) and nearly a third of the daily variability (r 2 = 0.32) within the Comal Springs discharge record.Statistically significant teleconnections to flow are demonstrated within the discharge record of Comal Springs. The El Niño-Southern Oscillation (ENSO, as measured by the Southern Oscillation Index) and the Pacific Decadal Oscillation (PDO) are shown to exhibit statistically significant correlations with annual mean flow from Comal Springs. PDO modulation of ENSO results in mean flow anomalies of 21.9% between extreme quintile years. The Atlantic Multi-decadal Oscillation (AMO) appears to exert influence based on the magnitude of the index value, irrespective of its positive or negative condition (p < 0.01), with the highest quintile (based on magnitude) years correlating with strong positive flow anomalies. A composite index was developed which combines the AMO, PDO and SOI. The extreme quintile years of this index demonstrate a 32.4% divergence in flow (p < 0.01) while demonstrating a stronger skill at capturing negative flow anomalies than positive anomalies.Precipitation data, at 4-km spatial resolution, were utilized to examine the temporal and spatial correlation of water input to the EA with rates of average monthly discharge from Comal Springs. The spatial dependence of the correlation between precipitation and Comal Springs discharge indicates significant seasonal variability. Overall, the correlation between precipitation and discharge is significant for spring, summer and fall seasons and not significant for winter.

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Section: Teleconnectionsmentioning

confidence: 98%

Discharge variability for an artesian spring of the Edwards Aquifer: Comal Springs (1933–2007)

Cox

Meng

Khedun

et al. 2009

Intl Journal of Climatology

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“…For example, the site observations indicate that the dry summer in 1996 was preceded by a wet winter (160 mm), whereas the wet summer in 1997 had a dry (14 mm) antecedent winter. Thus, the inverse relation could be applicable over other years, as shown by McCabe and Clark (2006), and form the basis for a long-term modelling study.…”

Section: Synthesis and Conclusionmentioning

confidence: 99%

“…Precipitation amounts in each season have been hypothesized to be linked physically through several proposed pathways (e.g. Gutzler and Preston, 1997;Gutzler, 2000;Zhu et al, 2005;McCabe and Clark, 2006;Mo, 2008;Notaro and Zarrin, 2011). In this study, we analyse the ecohydrological response in a ponderosa pine hillslope during two contrasting winter to summer transitions: a wet winter followed by a dry summer (1992)(1993)) and a dry winter followed by a wet summer (1993)(1994).…”

Section: Synthesis and Conclusionmentioning

confidence: 99%

“…Interestingly, several studies have identified an inverse relation between the relative magnitudes of precipitation in each season and explored the potential mechanisms or teleconnections underlying the observations (e.g. Gutzler and Preston, 1997;Gutzler, 2000;Ellis and Hawkins, 2001;Zhu et al, 2005;McCabe and Clark, 2006;Mo, 2008;Notaro and Zarrin, 2011). In these studies, the snow amount and duration in the Rocky Mountains are considered to alter surface albedo, temperature and moisture, which affect the land-ocean thermal gradient with the East Pacific and the strength of the North American monsoon.…”

Section: Introductionmentioning

confidence: 99%

“…To apply the model effectively to the forested site, we performed a series of modifications to the original formulation of Rinehart et al (2008). Because the site is representative of ponderosa pine hillslope areas in Southwestern United States (Brandes and Wilcox, 2000) and the selected water years depict the snow-monsoon inverse relation (McCabe and Clark, 2006), the ecohydrological insights gained from the modelling study are relevant to forests throughout the region and for other years. Moreover, our focus on spatial patterns during the winter to summer transition sheds light on the controlling factors and thresholds for runoff production and lateral connectivity in forested hillslopes.…”

Section: Introductionmentioning

confidence: 99%

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Forest ecohydrological response to bimodal precipitation during contrasting winter to summer transitions

Mahmood

Vivoni

2013

Ecohydrology

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The ecohydrological response of forested landscapes in the Southwestern United States depends on the relative magnitude of precipitation during the winter and summer seasons. Prior climate studies have identified an inverse relation in the bimodal regime such that wet winter periods are followed by dry summers and vice versa. Despite this key prediction, the impact of contrasting winter to summer transitions on hillslope hydrology has not been investigated. In this study, we use the Triangulated Irregular Network‐based Real‐time Integrated Basin Simulator distributed hydrologic model with modifications in the snow module to generate a consistent set of high‐resolution hydrologic estimates in a ponderosa pine hillslope in northern New Mexico, United States. The model is evaluated against available observations of snow depth, soil moisture and runoff over two water years yielding reliable spatial distributions during the winter to summer transitions. We find that a wet winter followed by a dry summer promotes evapotranspiration losses that gradually dry the soil and disconnect lateral fluxes in the forested hillslope, leading to soil moisture patterns resembling vegetation patches. Conversely, a dry winter prior to a wet summer results in soil moisture increases that promote lateral connectivity and soil moisture patterns with the signature of terrain curvature. An opposing temporal switch between infiltration and saturation excess runoff is also identified. These contrasting responses indicate that the inverse relation has significant consequences on hillslope water availability and its spatial distribution with implications on other ecohydrological processes including vegetation phenology, groundwater recharge and geomorphic development. Copyright © 2013 John Wiley & Sons, Ltd.

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Interannual Covariation of the North American and African Summer Monsoons

Luo,

Weng,

Luo

et al. 2024

Intl Journal of Climatology

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The North American summer monsoon (NASM) and the North African summer monsoon (NAFSM) are two vital subsystems of the global monsoon. To date, the potential inter‐monsoon relationship between the NASM and NAFSM has not been fully understood. To fill this gap, we investigate the NASM–NAFSM relationship on the interannual timescale during the period of 1979–2022. Based on statistical methods (including correlation, empirical orthogonal function and cross wavelet analyses), we identify a noteworthy interannual covariation of the NASM and NAFSM. This observed NASM–NAFSM covariation can be explained by atmospheric circulation anomalies associated with sea surface temperature (SST) anomalies in the tropical central‐eastern Pacific and tropical Atlantic, suggesting the critical roles of tropical Pacific–Atlantic SST anomalies in shaping the NASM–NAFSM covariation. The results of Coupled Model Intercomparison Project Phase 6 (CMIP6) models indicate that a model's ability to simulate the NASM–NAFSM covariation tends to be related to its ability to reproduce the modulating effects of the tropical Pacific–Atlantic SST anomalies. These results have potential implications for seasonal forecasts of the NASM and NAFSM variations, suggesting that the NASM and NAFSM can be considered simultaneously in climate predictions.

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Shifting covariability of North American summer monsoon precipitation with antecedent winter precipitation

Cited by 11 publications

References 16 publications

Discharge variability for an artesian spring of the Edwards Aquifer: Comal Springs (1933–2007)

Discharge variability for an artesian spring of the Edwards Aquifer: Comal Springs (1933–2007)

Forest ecohydrological response to bimodal precipitation during contrasting winter to summer transitions

Interannual Covariation of the North American and African Summer Monsoons

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