Reconstructing extreme precipitation in the Sacramento River Watershed using tree‐ring based proxies of cold‐season precipitation

2021 ◽  
Author(s):  
Swatah Snigdha Borkotoky ◽  
A. Park Williams ◽  
Edward R. Cook ◽  
Scott Steinschneider
Keyword(s):  
Tree Ring ◽  
Extreme Precipitation ◽  
Cold Season ◽  
Sacramento River ◽  
River Watershed

Selection and application of a rainbow trout toxicity testing procedure for screening Sacramento River Watershed, California samples

2008 ◽  
Vol 150 (1-4) ◽  
pp. 333-349
Author(s):  
Jeffrey L. Miller ◽  
Michael J. Miller ◽  
Victor de Vlaming ◽  
Karen Larsen ◽  
Edward Smith ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Toxicity Testing ◽  
Testing Procedure ◽  
Sacramento River ◽  
River Watershed

scholarly journals Large-Scale Flow Patterns Associated with Extreme Precipitation and Atmospheric Rivers over Norway

2019 ◽  
Vol 147 (4) ◽  
pp. 1415-1428 ◽  
Author(s):  
Imme Benedict ◽  
Karianne Ødemark ◽  
Thomas Nipen ◽  
Richard Moore
Keyword(s):  
Extreme Precipitation ◽  
Large Scale ◽  
Moisture Flux ◽  
Cold Season ◽  
Fuzzy Cluster ◽  
The South ◽  
Atmospheric Rivers ◽  
The North ◽  
Extreme Precipitation Events ◽  
Precipitation Events

Abstract A climatology of extreme cold season precipitation events in Norway from 1979 to 2014 is presented, based on the 99th percentile of the 24-h accumulated precipitation. Three regions, termed north, west, and south are identified, each exhibiting a unique seasonal distribution. There is a proclivity for events to occur during the positive phase of the NAO. The result is statistically significant at the 95th percentile for the north and west regions. An overarching hypothesis of this work is that anomalous moisture flux, or so-called atmospheric rivers (ARs), are integral to extreme precipitation events during the Norwegian cold season. An objective analysis of the integrated vapor transport illustrates that more than 85% of the events are associated with ARs. An empirical orthogonal function and fuzzy cluster technique is used to identify the large-scale weather patterns conducive to the moisture flux and extreme precipitation. Five days before the event and for each of the three regions, two patterns are found. The first represents an intense, southward-shifted jet with a southwest–northeast orientation. The second identifies a weak, northward-shifted, zonal jet. As the event approaches, regional differences become more apparent. The distinctive flow pattern conducive to orographically enhanced precipitation emerges in the two clusters for each region. For the north and west regions, this entails primarily zonal flow impinging upon the south–north-orientated topography, the difference being the latitude of the strong flow. In contrast, the south region exhibits a significant southerly component to the flow.

Low river survival of juvenile steelhead in the Sacramento River watershed

2020 ◽  
Vol 103 (5) ◽  
pp. 531-541
Author(s):  
Philip Thomas Sandstrom ◽  
Arnold J. Ammann ◽  
Cyril Michel ◽  
Gabriel Singer ◽  
Eric D. Chapman ◽  
...  
Keyword(s):  
Sacramento River ◽  
River Watershed

Impacts of Postdam Land Use/Land Cover Changes on Modification of Extreme Precipitation in Contrasting Hydroclimate and Terrain Features

2014 ◽  
Vol 15 (2) ◽  
pp. 777-800 ◽  
Author(s):  
Abel T. Woldemichael ◽  
Faisal Hossain ◽  
Roger Pielke
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Extreme Precipitation ◽  
Windward Side ◽  
Leeward Side ◽  
Land Use Land Cover ◽  
Climate Feedbacks ◽  
River Watershed ◽  
Flat Terrain ◽  
Terrain Features

Abstract Understanding the impact of postdam climate feedbacks, resulting from land use/land cover (LULC) variability, on modification of extreme precipitation (EP) remains a challenge for a twenty-first-century approach to dam design and operation. In this study, the Regional Atmospheric Modeling System (RAMS, version 6.0) was used, involving a number of predefined LULC scenarios to address the important question regarding dams and their impoundments: How sensitive are the hydroclimatology and terrain features of a region in modulating the postdam response of climate feedbacks to EP? The study region covered the Owyhee Dam/Reservoir on the Owyhee River watershed (ORW), located in eastern Oregon. A systematic perturbation of the relative humidity in the initial and boundary condition of the model was carried out to simulate EP. Among the different LULC scenarios used in the simulation over the ORW, irrigation expansion in the postdam era resulted in an increase in EP up to 6% in the 72-h precipitation total. The contribution of the reservoir on EP added 8% to the 72-h total when compared to the predam LULC conditions. To address the science question, a previously completed investigation on the Folsom Dam [American River watershed (ARW)] in California was compared with the ORW findings on the basis of contrasting differences in hydroclimatology and terrain features. The results indicate that the postdam LULC change scenarios impact EP of ORW (Owyhee Dam) much greater than the EP of the ARW (Folsom Dam) because of its semiarid climate and flat terrain. EP was less sensitive to LULC changes on the windward side of the mountainous terrain of ARW as compared to the leeward side of the flat terrain of ORW.

Hydrologic Model Development of the Sacramento River Watershed to Support TMDL Development

2005 ◽  
Vol 2005 (3) ◽  
pp. 1542-1570 ◽  
Author(s):  
Stephen Carter ◽  
Debra Denton ◽  
Mark Sievers ◽  
Peter Von Loewe ◽  
John Craig
Keyword(s):  
Model Development ◽  
Hydrologic Model ◽  
Sacramento River ◽  
River Watershed

scholarly journals Multicentury tree ring reconstruction of annual streamflow for the Maule River watershed in south central Chile

2011 ◽  
Vol 47 (6) ◽  
Author(s):  
Rocío B. Urrutia ◽  
Antonio Lara ◽  
Ricardo Villalba ◽  
Duncan A. Christie ◽  
Carlos Le Quesne ◽  
...  
Keyword(s):  
Tree Ring ◽  
Annual Streamflow ◽  
Central Chile ◽  
River Watershed ◽  
South Central ◽  
Tree Ring Reconstruction

scholarly journals A Climatology of Atmospheric Rivers in New Zealand

2021 ◽  
Vol 34 (11) ◽  
pp. 4383-4402
Author(s):  
Hamish D. Prince ◽  
Nicolas J. Cullen ◽  
Peter B. Gibson ◽  
Jono Conway ◽  
Daniel G. Kingston
Keyword(s):  
New Zealand ◽  
Extreme Precipitation ◽  
Moisture Flux ◽  
Cold Season ◽  
Southern Alps ◽  
Windward Side ◽  
Western Coast ◽  
Jet Streams ◽  
Extreme Precipitation Events ◽  
Hemisphere Winter

AbstractThe occurrence of extreme precipitation events in New Zealand regularly results in devastating impacts to the local society and environment. An automated atmospheric river (AR) detection technique (ARDT) is applied to construct a climatology (1979–2019) of extreme midlatitude moisture fluxes conducive to extreme precipitation. A distinct seasonality exists in AR occurrence aligning with seasonal variations in the midlatitude jet streams. The formation of the Southern Hemisphere winter split jet enables AR occurrence to persist through all seasons in northern regions of New Zealand, while southern regions of the country exhibit a substantial (50%) reduction in AR occurrence as the polar jet shifts southward during the cold season. ARs making landfall on the western coast of New Zealand (90% of all events) are characterized by a dominant northwesterly moisture flux associated with a distinct dipole pressure anomaly, with low pressure to the southwest and high pressure to the northeast of New Zealand. Precipitation totals during AR events increase with AR rank (five-point scale) throughout the country, with the most substantial increase on the windward side of the Southern Alps (South Island). The largest events (rank 5 ARs) produce 3-day precipitation totals exceeding 1000 mm. ARs account for up to 78% of total precipitation and up to 94% of extreme precipitation on the west coast of the South Island. Assessment of the multiscale atmospheric processes associated with AR events governing extreme precipitation in the Southern Alps of New Zealand should remain a priority given their hydrological significance and impact on people and infrastructure.

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