Enhanced winter, spring, and summer hydroclimate variability across California from 1940 to 2019

2021 ◽  
Author(s):  
Diana Zamora‐Reyes ◽  
Bryan Black ◽  
Valérie Trouet
Keyword(s):  
Hydroclimate Variability

EXTREME HYDROCLIMATE VARIABILITY IN KENYA'S BARINGO BASIN DURING THE LATE PLIOCENE: THE DIATOM RECORD

2018 ◽  
Author(s):  
Karlyn Westover ◽  
◽  
Jeffery Stone ◽  
Nathan Rabideaux ◽  
Chad L. Yost ◽  
...  
Keyword(s):  
Late Pliocene ◽  
Hydroclimate Variability

HIGH-RESOLUTION STALAGMITE RECORD EXAMINING LOCAL HYDROCLIMATE VARIABILITY FROM A SHALLOW CAVE IN SEMI-ARID NEW MEXICO

2019 ◽  
Author(s):  
Natasha Sekhon ◽  
◽  
Jay L. Banner ◽  
Bryan Black ◽  
Nathan Miller ◽  
...  
Keyword(s):  
New Mexico ◽  
High Resolution ◽  
Hydroclimate Variability ◽  
Semi Arid

A lake sediment–based paleoecological reconstruction of late Holocene fire history and vegetation change in Great Basin National Park, Nevada, USA

2021 ◽  
pp. 1-15
Author(s):  
Christopher S. Cooper ◽  
David F. Porinchu ◽  
Scott A. Reinemann ◽  
Bryan G. Mark ◽  
James Q. DeGrand
Keyword(s):  
Great Basin ◽  
Relative Abundance ◽  
Vegetation Change ◽  
Fire History ◽  
Ice Age ◽  
Sediment Geochemistry ◽  
Catchment Scale ◽  
Composition And Structure ◽  
Hydroclimate Variability ◽  
Late Fifteenth

Abstract Analyses of macroscopic charcoal, sediment geochemistry (%C, %N, C/N, δ13C, δ15N), and fossil pollen were conducted on a sediment core recovered from Stella Lake, Nevada, establishing a 2000 year record of fire history and vegetation change for the Great Basin. Charcoal accumulation rates (CHAR) indicate that fire activity, which was minimal from the beginning of the first millennium to AD 750, increased slightly at the onset of the Medieval Climate Anomaly (MCA). Observed changes in catchment vegetation were driven by hydroclimate variability during the early MCA. Two notable increases in CHAR, which occurred during the Little Ice Age (LIA), were identified as major fire events within the catchment. Increased C/N, enriched δ15N, and depleted δ13C values correspond with these events, providing additional evidence for the occurrence of catchment-scale fire events during the late fifteenth and late sixteenth centuries. Shifts in the vegetation community composition and structure accompanied these fires, with Pinus and Picea decreasing in relative abundance and Poaceae increasing in relative abundance following the fire events. During the LIA, the vegetation change and lacustrine geochemical response was most directly influenced by the occurrence of catchment-scale fires, not regional hydroclimate.

scholarly journals Lake Neor reveals how mountain vegetation responded to 7000 years of hydroclimate variability in northwestern Iran

2021 ◽  
Author(s):  
Khadijeh Alinezhad ◽  
Elias Ramezani ◽  
Morteza Djamali ◽  
Arash Sharifi ◽  
Alireza Naqinezhad ◽  
...  
Keyword(s):  
Hydroclimate Variability ◽  
Northwestern Iran ◽  
Mountain Vegetation

scholarly journals Regional patterns of hydroclimate variability in southeastern Australia over the past 1200 years

2019 ◽  
Author(s):  
Bronwyn C Dixon ◽  
Jonathan T Tyler ◽  
Benjamin James Henley ◽  
Russell Drysdale
Keyword(s):  
Regional Patterns ◽  
The Past ◽  
Southeastern Australia ◽  
Hydroclimate Variability

scholarly journals Hydroclimate variability during the last 2700 years based on stalagmite multi-proxy records in the central-western Mediterranean

2021 ◽  
Vol 269 ◽  
pp. 107137
Author(s):  
Mercè Cisneros ◽  
Isabel Cacho ◽  
Ana Moreno ◽  
Heather Stoll ◽  
Judit Torner ◽  
...  
Keyword(s):  
Western Mediterranean ◽  
Proxy Records ◽  
Hydroclimate Variability

Hydroclimate variability of northern Chilean Patagonia during the last 20 kyr inferred from the bulk organic geochemistry of Lago Castor sediments (45°S)

2019 ◽  
Vol 204 ◽  
pp. 105-118 ◽  
Author(s):  
Géraldine Fiers ◽  
Sebastien Bertrand ◽  
Maarten Van Daele ◽  
Emma Granon ◽  
Brian Reid ◽  
...  
Keyword(s):  
Organic Geochemistry ◽  
Chilean Patagonia ◽  
Hydroclimate Variability

scholarly journals Past millennium hydroclimate variability from Corsican pine tree‐ring chronologies

Boreas ◽  
2021 ◽  
Author(s):  
Jan Esper ◽  
Claudia Hartl ◽  
Oliver Konter ◽  
Frederick Reinig ◽  
Philipp Römer ◽  
...  
Keyword(s):  
Tree Ring ◽  
Pine Tree ◽  
Hydroclimate Variability ◽  
Past Millennium

scholarly journals Observed Mesoscale Hydroclimate Variability of North America’s Allegheny Mountains at 40.2° N

Climate ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 91
Author(s):  
Evan Kutta ◽  
Jason Hubbart
Keyword(s):  
Extreme Values ◽  
Dew Point ◽  
Convective Precipitation ◽  
Moisture Advection ◽  
Precipitation Regimes ◽  
Hydroclimate Variability ◽  
Mountain System ◽  
Meteorological Observations ◽  
Allegheny Mountains ◽  
Hydroclimatic Variability

Spatial hydroclimatic variability of Eastern North America’s Allegheny Mountain System (AMS) is commonly oversimplified to elevation differences and the rain-shadow effect. Descriptive and higher order statistical properties of hourly meteorological observations (1948–2017) from seven airports were analyzed to better understand AMS climatic complexity. Airports were located along a longitudinal transect (40.2 °N) and observation infrastructure was positioned to minimize climatic gradients associated with insolation, slope, and aspect. Results indicated average ambient temperature was well correlated with airport elevation (R2 = 0.97). However, elevation was relatively poorly correlated to dew point temperature (R2 = 0.80) and vapor pressure deficit (R2 = 0.61) heterogeneity. Skewness and kurtosis of ambient and dew point temperatures were negative at all airports indicating hourly values below the median were more common and extreme values were less common than a normal distribution implies. Westerly winds accounted for 54.5% of observations indicating prevailing winds misrepresented nearly half of AMS weather phenomena. The sum of maximum hourly precipitation rates was maximized in Philadelphia, PA implying a convective precipitation maximum near the border of Piedmont and Coastal Plain provinces. Results further indicate the AMS represents a barrier to omnidirectional moisture advection suggesting physiographic provinces are characterized by distinct evapotranspiration and precipitation regimes. The current work draws attention to observed mesoscale hydroclimatic heterogeneity of the AMS region and identifies mechanisms influencing local to regional water quantity and quality issues that are relevant to many locations globally.

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