Smerdon, J. E., et al. (2017), Comparing proxy and model estimates
of hydroclimate variability and change over the Common Era, Clim.
«The fact that the drought atlases provide a nearly hemispheric view
of hydroclimate variability provides an incredible amount of information that can be used to better understand what was happening in the atmosphere and ocean,» Coats said.
Recommendations: The next generation of PAGES 2k climate reconstructions should target reconstructions
of hydroclimate as well as temperature.
Coats, S., 2015: Paleoclimate Model - Data Comparisons
of Hydroclimate over North America with a Focus on Megadroughts.
Not exact matches
«These patterns that are based on decadal analysis
of modern data, and then the
hydroclimate proxies that give the salinity in the oceans and the rainfall on land seem to show the same picture.»
Succeeding in the field requires incredible patience combined with the ability to think deeply about how the sparse but growing network
of speleothems, combined with other
hydroclimate records, can inform our understanding
of past climate dynamics.
«It is odd to me to think
of century - scale
hydroclimate variability in terms
of «extremes», a term typically reserved in climate science for timescales
of hours to years.»
The researchers used 196
of these «proxy» records to create a «
hydroclimate reconstruction»
of the northern hemisphere back to the 9th century.
Paper: Niedermeyer, E.M., Sessions, A.L., Feakins, S.J., Mohtadi, M.:
Hydroclimate of the western Indo - Pacific Warm Pool during the past 24,000 years.
New Paper by Nichols et al
Hydroclimate of the northeastern United States is highly sensitive to solar forcing http://www.agu.org/pubs/crossref/2012/2011GL050720.shtml it is stated: We propose that the Arctic / North Atlantic Oscillation (AO / NAO) can amplify small solar fluctuations, producing the reconstructed hydrological variations.
Modeling 12 Centuries
of Northern Hemispheric
Hydroclimate.
The results
of this study have implications on interpreting future changes to the
hydroclimate of Peninsular Florida, such as the influence
of climate change and low frequency changes to the Atlantic meridional overturning circulation that comprises
of the Loop and the Florida Currents as part
of its upper branch.
- ARAMATE (The reconstruction
of ecosystem and climate variability in the north Atlantic region using annually resolved archives
of marine and terrestrial ecosystems)- CLIM - ARCH-DATE (Integration
of high resolution climate archives with archaeological and documentary evidence for the precise dating
of maritime cultural and climatic events)- CLIVASH2k (Climate variability in Antarctica and Southern Hemisphere in the past 2000 years)- CoralHydro2k (Tropical ocean
hydroclimate and temperature from coral archives)- Global T CFR (Global gridded temperature reconstruction method comparisons)- GMST reconstructions - Iso2k (A global synthesis
of Common Era
hydroclimate using water isotopes)- MULTICHRON (Constraining modeled multidecadal climate variability in the Atlantic using proxies derived from marine bivalve shells and coralline algae)- PALEOLINK (The missing link in the Past — Downscaling paleoclimatic Earth System Models)- PSR2k (Proxy Surrogate Reconstruction 2k)
He is currently Co-Chair
of the GEWEX Regional
Hydroclimate Panel, and coordinator
of the Coordinated Regional Climate Downscaling Experiment (CORDEX), both elements
of the World Climate Research Programme.
Individual records from caves and other paleo -
hydroclimate proxies have implied that simultaneous drying
of the Northern tropics and wetting
of the Southern tropics followed Heinrich events, consistent with southward shifts
of the tropical rain belts and the thermal equator.
Masson - Delmotte et al. (2005) highlight an abrupt drop in GRIP deuterium excess at 4.5 ka, and suggest that this change in isotopes
of precipitation over central Greenland may have recorded a shift in regional
hydroclimate.
The hemispheric scale adds to the potential uses
of what was already the gold standard
of paleo -
hydroclimate research, said Sloan Coats, a climate dynamicist at the University
of Colorado who studies megadroughts using the atlases.
Hydroclimate of the northeastern United States is highly sensitive to solar forcing, Nichols et al, 02/2012; read more here.
The 2000 - 2004 dry spell was the worst drought in the region in 800 years, the researchers claim, and before the century is over we'll look back on those days as the wetter end
of a much larger
hydroclimate shift.
Therefore, decadal hydrological prediction requires an understanding
of both the externally forced component and the prediction skill
of internally generated decadal
hydroclimate variability.
Konecky, B. L., et al. (2017), Global synthesis
of Common Era
hydroclimate using water isotope proxies from multiple archives: First results from the PAGES Iso2k Project, Abstract PP43D - 03 presented at 2017 Fall Meeting, AGU, New Orleans, La..
This work is supported through NSF Award No. 1049219, Investigation
of Decadal Climate Predictability and
Hydroclimate impacts (IDCPI) on the Western US.
Called the Past Global Changes (PAGES) Iso2k Project (PAGES Iso2k), the project brings together records that will advance the community's understanding
of how
hydroclimate varied over the past 2,000 years, also referred to as the Common Era.
DOI: 10.1038 / ncomms9939 Fennoscandian freshwater control on Greenland
hydroclimate shifts at the onset
of the Younger Dryas
Algal microfossis in sediment cores taken from this famous pond reveal anthropogenic changes in the
hydroclimate and trophic status
of the lake over the last 1800 years.
The enhanced resolution in the CM2.5 model has a significantly improved simulation
of many aspects
of climate, particularly
hydroclimate over continental regions (Delworth et al., 2012, Figures 5,6,7 and 9); many
of the improvements in simulation
of near - surface climate in CM2.5 are recovered in FLOR (e.g., Jia et al. 2015).
This improvement has allowed GFDL scientists and their collaborators to use this model for innovative studies
of regional
hydroclimate change (Doi et al, 2012,2013; Kapnick and Delworth, 2013; Delworth and Zeng, 2014; Kapnick et al., 2014) and ocean circulation (Lee et al, 2013).
As a result
of these enhancements, the CM2.5 model has a significantly improved simulation
of many aspects
of climate, particularly
hydroclimate over continental regions (Delworth et al., 2012, Figures 5,6,7 and 9) and aspects
of ocean circulation.