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**Denise Gutzmer** @DeniseGutzmer@mindly.social · 1d

Denise Gutzmer @DeniseGutzmer@mindly.social

Colorado River snowpack takes major dive; streamflow projections lowered

"Since April 9, when snowstorms pushed snowpack from 91% to just over 100% in a single day, conditions have changed dramatically and levels have fallen to 70% of normal as of Friday, April 18."

#ColoradoRiver #ColoradoRiverBasin #snowpack #water

https://www.8newsnow.com/news/local-news/colorado-river-snowpack-takes-major-dive-streamflow-projections-lowered/

Continued thread

**CelloMom On Cars** @CelloMomOnCars@mastodon.social · Apr 2

Apr 2

CelloMom On Cars @CelloMomOnCars@mastodon.social

"A study of tree rings in the Gaspesie's Sainte-Anne River area reveals that snowpacks have been declining noticeably in the region's mountains for nearly nine decades. The researchers say the phenomenon is directly linked to global warming.

They add that the decline in #snowpack has significant implications for #water management and regional wildlife."

https://phys.org/news/2025-04-tree-canada-gaspsie-mountains-reveal.html

Phys.org · Apr 1Tree rings from Canada's Gaspésie mountains reveal effects of global warming dating back almost a centuryBy Patrick Lejtenyi

**UberZeitgeist** @UberZeitgeist@mstdn.social · Feb 24

Feb 24

UberZeitgeist @UberZeitgeist@mstdn.social

Snowman life is tough
Going from a hard-packed day
To flat-out-just-done

#Haiku #OneHaikuADay #WritersCollective #writingcommunity #BackToHaiku #February #Seasons #Winter #Cold #Frigid #Snow #Freeze #Snowman #Paked #Snowpack #Thaw

February 24, 2025

Color image of small snow people on a front porch. Image shows one snowman still standing, twigs for arms and a leafy headdress, and the other fallen back, flat and thawing on the porch, arms askew, leafy hairdo akimbo.

Continued thread

**Denise Gutzmer** @DeniseGutzmer@mindly.social · Feb 13

Feb 13

Denise Gutzmer @DeniseGutzmer@mindly.social

#Snowpack is below normal in parts of the Western US, particularly in Arizona and New Mexico.

The image shows a map of the Western US with percent of snow water equivalent.

#snow #water #swe

**Global News Environment** @glenv_mirror@mastodon.hongkongers.net · Feb 11

Feb 11

Global News Environment @glenv_mirror@mastodon.hongkongers.net

More drought worries as unusually dry January leaves B.C. snowpacks depleted
The B.C. River Forecast Centre's Feb. 1 snowpack report confirmed what many have already observed: January was unusually dry.
#weather #environment #BC #BCweather #Drought #Snowpack
https://globalnews.ca/news/11014347/bc-snow-survey-february-drought-worries/

**Global News BC** @glbc_mirror@mastodon.hongkongers.net · Feb 11

Feb 11

Global News BC @glbc_mirror@mastodon.hongkongers.net

**Global News Okanagan** @glokanagan_mirror@mastodon.hongkongers.net · Feb 11

Feb 11

Global News Okanagan @glokanagan_mirror@mastodon.hongkongers.net

**Global News** @glnews_mirror@mastodon.hongkongers.net · Feb 11

Feb 11

Global News @glnews_mirror@mastodon.hongkongers.net

**Greg Cocks** @GregCocks@techhub.social · Jan 21 *

Jan 21 *

Greg Cocks @GregCocks@techhub.social

Atop The Oregon Cascades, [Research] Team Finds A Huge Buried Aquifer
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https://www.eurekalert.org/news-releases/1069774 <-- shared technical article
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https://doi.org/10.1073/pnas.2415155122 <-- shared paper
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https://www.usgs.gov/centers/oregon-water-science-center/science/mckenzie-river-source-water-study <-- shared USGS technical article, 2011, ‘McKenzie River Source Water Study’
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https://youtu.be/6R8e5HwGMwU?si=sniW4bvvzzviTYie <-- shared media video overview
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#GIS #spatial #mapping #model #modeling #water #hydrology #Oregon #Cascades #CascadeMountains #PNW #PacificNorthwest #volcanic #rocks #aquifer #waterresources #watermanagement #climatechange #snowpack #drought #spatialanalysis #CriticalZone #geohazards #geology #engineeringgeology #landscapes #weathering #bedrock #holocene #groundwater #structuralgeology #orogeny #remotesensing #geophysics #sampling #drilling #porosity #permability #tomography #lava #spring #seep #breccia #discharge #streams #runoff #precipitation #climate #rainfall #recharge

photo - Scientists examine a large-volume spring in young volcanic rocks of the McKenzie River watershed on the west side of the Cascade topographic crest that was monitored as part of this study. Credit: Benjamin Nash

map, photo and charts - (A) Electrical resistivity tomography of Olallie North Spring, which emerges along a flow contact of _25 ka Scott Mountain lava flows. Lateral variations correspond to spring discharge points along the lava flow basal breccia such as depicted in (B) (photo: Benjamin Nash). (C) Mean of total yearly range in discharge _Q divided by mean annual flow Qavg versus average upstream age for springs and streams. The horizontal line defines “spring-” versus “runoff-” dominated. (D) SD of yearly average summer discharge (June–September), normalized by Qavg, with CZ state shift labeled.

$maps and chart - (A) Distribution of geothermal drill holes. Thin black circles’ radii scale with total logged length, and colors indicate the fraction of length for which dT=dz < 20_C/km (implying downward flux of meteoric water). Red circles are the fraction with inverted gradients (dT=dz < 0_C/km). The purple contour indicates bedrock ages <2 Ma, while stars mark Holocene age phreatomagmatic eruption vents. (B) Two example temperature-depth logs from deep wells in old and young bedrock. (C) Porosity (blue) and resistivity (orange) in the Santiam Pass drill hole SP 77-24. Dashed lines indicate low porosity at high measured resistivity. (D) Chemical weathering tracked by oxidation state of iron in the Santiam Pass drill hole. The green box indicates range of Quaternary High Cascades lavas (SI Appendix), indicating that much of the SP 77-24 hole has been oxidized.$

maps and cross section - Oregon Cascades study site. (A) Topography, rivers (from USGS blue lines), stream gauges, lakes, and faults. Olallie North Spring (ONS) and HJ Andrews Experimental Forest (HJA) are labeled. (B) Surface bedrock ages (18), geothermal drill holes, and Quaternary volcanic vents (19). Labeled vents exhibited Holocene phreatomagmatic activity: Sand Mountain volcanic field (SMF), Blue Lake Crater (BLC), Twin Craters (TC). Gray areas are mapped as “Sedimentary deposits and rocks” in ref. 18. (C) Cross-section of swath topography and surface bedrock ages (N-S average of _4 km from Santiam Pass, pink box in panel A), with subsurface structures based on published geologic maps (SI Appendix). The proposed Critical Zone (CZ) state shift and physiographic “Western” and “High” Cascade provinces are labeled. (D) Temperature gradient versus depth in drill holes from panel (C). Near-isothermal or inverted temperature gradients define the “rain curtain.”

**Greg Cocks** @GregCocks@techhub.social · Dec 26, 2024

Dec 26, 2024

Greg Cocks @GregCocks@techhub.social

Changes In Store For Atmospheric Rivers [California and PNW, USA and Canada]
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https://yubanet.com/scitech/changes-in-store-for-atmospheric-rivers/ <-- shared technical article
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https://doi.org/10.1038/s43247-024-01774-0 <-- shared paper
--
#GIS #spatial #mapping #spatialanalysis #meteorology #weather #climatechange #warming #WestCoast #USA #California #PNW #PacificNorthWest #Canada #atmosphericriver #extremeweather #risk #hazard #model #modeling #spatiotemporal #precipitation #snowpack #rainfall #ocean #atmosphere #risk #hazard #flood #flooding #storm #stormsurge #regional
#NCAR @NCAR

A powerful cyclone fed by a so-called atmospheric river off the U.S. West Coast pictured by a weather satellite. (Image credit: CIRA)

maps - Comparing high versus standard resolution CESM:
a) Snapshot of Integrated Water Vapor (IWV) during an AR, simulated using the fully-coupled CESM1.3 model with 0.25° atmosphere and 0.1° ocean resolution (representative of ARs in this simulation). Regional areas described in this study are defined by the coastal locations where landfalling ARs occur, including Southern California (red circles), California (green circles, and Pacific Northwest (blue circles)
b) Snapshot of IWV during an AR simulated in CESM1.3 with 0.25° atmosphere and ~1° ocean resolution (representative of ARs in this simulation)
c) Daily mean sea surface temperature corresponding to (a)
d) Daily mean sea surface temperature corresponding to (b).

Infographic -The science behind atmospheric rivers (NOAA)

A storm darkens the sky at the mouth of the Russian River, north of Bodega Bay, Calif. The storm was driven largely by an "atmospheric river" over California. (Image credit: NOAA)

**Greg Cocks** @GregCocks@techhub.social · Dec 24, 2024 *

Dec 24, 2024 *

Greg Cocks @GregCocks@techhub.social

California Storms Recharged Watersheds, Geodesy Data Reveal
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https://eos.org/articles/california-storms-recharged-watersheds-geodesy-data-reveal <-- shared technical article
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https://doi.org/10.1029/2023GL107721 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #GPS #GNSS #water #recharge #hydrology #geodesy #meteorology #data #atmosphericriver #climatechange #extremeweather #storms #rainfall #precipitation #watersheds #drought #groundwater #reservoir #snowpack #waterresources #model #modeling #spatialanalysis #spatiotemporal #ground #changes #waterstorage #management #hydrogeodesy #interdisciplinary #gravity #shape #Earth #risk #hazard #ecosystems #naturaldisasters #California #USA

schematic - the average surface hydrologic response to non-atmospheric rivers (AR) (a & b) and AR (c & d) precipitation events with (a & d) and without (b & c) existing snowpack

(a) Spatial distribution of the 6-month standardized precipitation index (SPI) for 1 October 2022 (left) and 1 April 2023 (right), based on the PRISM monthly precipitation model (Daly et al., 1994; Oregon State University, 2023). Gray lines denote study watersheds. (b) Spatial distribution of GNSS-inferred terrestrial water storage (TWS) in October 2022 relative to the average GNSS-inferred TWS for all months of October over the study period (left) and the same for March 2023 relative to all months of March (right) in equivalent water height. Water-storage changes are calculated from all nine inversion products. (c) Spatial distribution of the 1-month standardized storage anomaly (SSA) for 1 October 2022 (left) and 1 April 2023 (right), derived from the monthly deviations from mean TWS shown in panel (b). (d) Time series of 6-month SPI (top), 1-month SSA constrained by detrended GNSS-inferred TWS (middle), and 1-month SSA constrained by GNSS-inferred TWS with a linear trend retained (bottom), spatially integrated across the Sierra Nevada watersheds. Shaded gray bars at the end of each time series highlight the first six months of Water Year 2023, when atmospheric rivers delivered a significant influx of water.

satellite image - Satellite image taken on October 24, 2021. A powerful atmospheric river over the Pacific brought an intense atmospheric river to the San Francisco Bay region of California. NASA MODIS/TERRA satellite image taken from NASA Worldview.

(a) Vertical displacements of Earth's surface (red = uplift, blue = subsidence) estimated from Global Navigation Satellite Systems (GNSS)
(b) terrestrial water storage (TWS) changes inferred from the GNSS-measured displacements
(c) snow water equivalent (SWE)
(d) cumulative precipitation
(e) CW3E-modeled runoff
(f) CW3E-modeled evapotranspiration (ET)
(g) CW3E-modeled TWS changes for the western United States from 1 October 2022–1 April 2023

**The Big Data Cluster** @cznbigdata@fediscience.org · Dec 7, 2024

Dec 7, 2024

The Big Data Cluster @cznbigdata@fediscience.org

Changing snowpack timing affect soil respiration and CO2 flux. This #AGU24 session includes patterns of dynamic water storage and soil respiration near Crested Butte, Colorado.

These climate-driven changes in #snowpack timing influence carbon cycling in semi-arid #ecosystems.

: https://bit.ly/AGU24_H31M0782

#CriticalZone #science #research

**Tino Eberl** @tinoeberl@mastodon.online · Oct 31, 2024

Oct 31, 2024

Tino Eberl @tinoeberl@mastodon.online

Erstmals seit Beginn der Aufzeichnungen vor 130 Jahren gibt es Ende Oktober noch keinen Schnee auf dem #MountFuji.

https://phys.org/news/2024-10-japan-mount-fuji.html

Normalerweise bildet sich die #Schneekappe Anfang Oktober, doch aufgrund ungewöhnlich hoher Temperaturen blieb der Gipfel bisher schneefrei. Experten vermuten, dass der #Klimawandel eine Rolle spielt. Dieser Sommer war einer der heißesten in #Japan und weltweit.

Phys.org · Oct 28, 2024Still no snow on Japan's Mount Fuji, breaking recordBy Science X

#Erderwärmung #Snowpack #Schneefall

**H2O Radio** @H2ORadio@journa.host · Aug 19, 2024

Aug 19, 2024

H2O Radio @H2ORadio@journa.host

Why...?

• The U.S. Air Force is defying an order to clean up #water

• Colorado’s #snowpack isn't ending up in the #Colorado #River

• Scientists are pretty stoked about #surfing

Get the answers in the current newscast of “This Week in Water” from H2O Radio. Soak it in! https://bit.ly/3CzL6tn

**Greg Cocks** @GregCocks@techhub.social · Aug 18, 2024

**Ruth Mottram** @Ruth_Mottram@fediscience.org · Aug 6, 2024

Aug 6, 2024

Ruth Mottram @Ruth_Mottram@fediscience.org

Georgina Woolley on #Arctic #Snowpack processes in models. A really interesting problem I'm hoping to work on more in the next few years. #snow affects everything from land to sea ice to glaciers...
#IGSnorthumbria2024