John Hammond
@hydrohammond.bsky.social
Research hydrologist and river photographer. www.riversfromabove.com
Pinned
John Hammond
@hydrohammond.bsky.social
· Mar 20
Hydrological Whiplash: Highlighting the Need for Better Understanding and Quantification of Sub‐Seasonal Hydrological Extreme Transitions
Hydrological whiplash, or the sub-seasonal transition between hydrological extremes, has broad implications for water resource management, ecosystems, infrastructure, and human society. As this pheno...
doi.org
Science! Super proud of this commentary that results from conversations started at @agu.org in December. We propose the term hydrological whiplash, sub-seasonal transitions between hydrological extremes, and outline why we think this topic needs greater attention.
doi.org/10.1002/hyp....
doi.org/10.1002/hyp....
Reposted by John Hammond
We're hiring in history of science at UW Madison! TT Assistant Professorship with a focus on water. Joint appointment between the History and Integrated Liberal Studies depts, and part of a university-wide hiring cluster on earth/sustainability science. jobs.wisc.edu/jobs/profess... #STS #HSMT
Professor of History - Madison, Wisconsin, United States
Current Employees: If you are currently employed at any of the Universities of Wisconsin, log in to Workday to apply through the internal application process.Job Category:FacultyEmployment Type:Regula...
jobs.wisc.edu
November 6, 2025 at 7:37 PM
We're hiring in history of science at UW Madison! TT Assistant Professorship with a focus on water. Joint appointment between the History and Integrated Liberal Studies depts, and part of a university-wide hiring cluster on earth/sustainability science. jobs.wisc.edu/jobs/profess... #STS #HSMT
@pbs.org NOVA keeping up the excellent science communication on hydrological extremes!
youtu.be/VHvkp_Quaiw?...
youtu.be/VHvkp_Quaiw?...
Superfloods: Why Deadly Flash Floods Are on the Rise | Full Documentary | NOVA | PBS
YouTube video by NOVA PBS Official
youtu.be
November 6, 2025 at 8:58 PM
@pbs.org NOVA keeping up the excellent science communication on hydrological extremes!
youtu.be/VHvkp_Quaiw?...
youtu.be/VHvkp_Quaiw?...
Fond memories from exploring the hydrology of Scotland this time last year
November 5, 2025 at 7:44 PM
Fond memories from exploring the hydrology of Scotland this time last year
I’ve just been learning about the Cleveland Water Alliance because of there super helpful YouTube videos explaining IOT sensor setup. What they’re doing with water monitoring across their region is amazing! m.youtube.com/@clevelandwa...
October 28, 2025 at 4:48 PM
I’ve just been learning about the Cleveland Water Alliance because of there super helpful YouTube videos explaining IOT sensor setup. What they’re doing with water monitoring across their region is amazing! m.youtube.com/@clevelandwa...
Significant precipitation finally headed for areas of the northeast that are in severe and extreme hydrological drought
October 28, 2025 at 3:02 PM
Significant precipitation finally headed for areas of the northeast that are in severe and extreme hydrological drought
Excited to start playing around with #IOT again! Narrow band IOT sensors are affordable and claim to have very long battery life with SIM cards that have a one time up front payment. Let’s see how this goes over the coming days….
October 28, 2025 at 12:52 AM
Excited to start playing around with #IOT again! Narrow band IOT sensors are affordable and claim to have very long battery life with SIM cards that have a one time up front payment. Let’s see how this goes over the coming days….
Reposted by John Hammond
💧 #WaterWednesday: The "predictability desert"
Between weather forecasts & climate projections lies a gap: 2 weeks-2 months out. This S2S timescale is crucial for water management but remains a weak link in forecasting.
New call for scientists to join forces: eos.org/opinions/sci...
Between weather forecasts & climate projections lies a gap: 2 weeks-2 months out. This S2S timescale is crucial for water management but remains a weak link in forecasting.
New call for scientists to join forces: eos.org/opinions/sci...
October 22, 2025 at 3:26 PM
💧 #WaterWednesday: The "predictability desert"
Between weather forecasts & climate projections lies a gap: 2 weeks-2 months out. This S2S timescale is crucial for water management but remains a weak link in forecasting.
New call for scientists to join forces: eos.org/opinions/sci...
Between weather forecasts & climate projections lies a gap: 2 weeks-2 months out. This S2S timescale is crucial for water management but remains a weak link in forecasting.
New call for scientists to join forces: eos.org/opinions/sci...
Reposted by John Hammond
Happy Friday!! Here are your #CatchmentCup2025 Great Eight!!
Its time to NARROW down to the Fabulous Four! You have until Tuesday 10/28 to vote and check out the amazing papers from these sites here: www.agu-h3s.org/rivercup
Its time to NARROW down to the Fabulous Four! You have until Tuesday 10/28 to vote and check out the amazing papers from these sites here: www.agu-h3s.org/rivercup
October 24, 2025 at 9:29 PM
Happy Friday!! Here are your #CatchmentCup2025 Great Eight!!
Its time to NARROW down to the Fabulous Four! You have until Tuesday 10/28 to vote and check out the amazing papers from these sites here: www.agu-h3s.org/rivercup
Its time to NARROW down to the Fabulous Four! You have until Tuesday 10/28 to vote and check out the amazing papers from these sites here: www.agu-h3s.org/rivercup
Reposted by John Hammond
Hydrology Paper of the Day @danielepenna.bsky.social on how hillslope trees utilize water from different seasons: water utilization depth and temporal water cycles associated with different residence times, and understanding processes characterized in the eastern Italian pre-Alps by stable isotopes.
Do #trees in different #hillslope positions use different #water #sources in a pre-Alpine #catchment? And is water #uptake mostly related to #summer or #winter #precipitation in this #humid #environment? Find out more in this study led by Giulia Zuecco at Ressi. www.sciencedirect.com/science/arti...
October 25, 2025 at 1:29 AM
Hydrology Paper of the Day @danielepenna.bsky.social on how hillslope trees utilize water from different seasons: water utilization depth and temporal water cycles associated with different residence times, and understanding processes characterized in the eastern Italian pre-Alps by stable isotopes.
Reposted by John Hammond
Calling fans of temporary waters! We invite you to submit an abstract to our ASLO-SIL special session "SS015 Drying waters: the science and management of temporary aquatic ecosystems".
More details at www.aslo.org/aslo-sil-2026/
Deadline 251125
@ryanmburrows.bsky.social @kuglerovastripe.bsky.social
More details at www.aslo.org/aslo-sil-2026/
Deadline 251125
@ryanmburrows.bsky.social @kuglerovastripe.bsky.social
2026 ASLO-SIL Joint Meeting - ASLO
The theme of the 2023 Aquatic sciences Meeting is Resilience and Recovery in Aquatic Systems. We encourage submissions that examine these topics and invite you to contribute special sessions on topics...
www.aslo.org
October 20, 2025 at 9:50 AM
Calling fans of temporary waters! We invite you to submit an abstract to our ASLO-SIL special session "SS015 Drying waters: the science and management of temporary aquatic ecosystems".
More details at www.aslo.org/aslo-sil-2026/
Deadline 251125
@ryanmburrows.bsky.social @kuglerovastripe.bsky.social
More details at www.aslo.org/aslo-sil-2026/
Deadline 251125
@ryanmburrows.bsky.social @kuglerovastripe.bsky.social
Reposted by John Hammond
🚨Session proposals are now open for the JpGU-AGU Joint Meeting, taking place 24-29 May 2026 in Chiba, Japan!
⛰️This hybrid conference will bring together researchers from around the world for groundbreaking discussions in the Earth and space sciences.
💻Submit a proposal by 15 Oct➡️ buff.ly/TemHVUx
⛰️This hybrid conference will bring together researchers from around the world for groundbreaking discussions in the Earth and space sciences.
💻Submit a proposal by 15 Oct➡️ buff.ly/TemHVUx
September 18, 2025 at 8:41 PM
🚨Session proposals are now open for the JpGU-AGU Joint Meeting, taking place 24-29 May 2026 in Chiba, Japan!
⛰️This hybrid conference will bring together researchers from around the world for groundbreaking discussions in the Earth and space sciences.
💻Submit a proposal by 15 Oct➡️ buff.ly/TemHVUx
⛰️This hybrid conference will bring together researchers from around the world for groundbreaking discussions in the Earth and space sciences.
💻Submit a proposal by 15 Oct➡️ buff.ly/TemHVUx
Reposted by John Hammond
EGU26 abstract submission is open! We invite you to submit your work to our large-sample hydrology session HS2.4.2 💻💧🌊
meetingorganizer.copernicus.org/EGU26/sessio...
meetingorganizer.copernicus.org/EGU26/sessio...
October 22, 2025 at 10:52 PM
EGU26 abstract submission is open! We invite you to submit your work to our large-sample hydrology session HS2.4.2 💻💧🌊
meetingorganizer.copernicus.org/EGU26/sessio...
meetingorganizer.copernicus.org/EGU26/sessio...
Reposted by John Hammond
How do reservoirs shape streamflow extremes in the Alps?
🌊 New paper from our team!
In his latest study, our #HYCLIMM member Jonas Götte and co-authors analyzed Alpine catchments to understand how (hydropower) #reservoirs influence #streamflow extremes.
🔗 doi.org/10.1088/3033...
#hydrology
🌊 New paper from our team!
In his latest study, our #HYCLIMM member Jonas Götte and co-authors analyzed Alpine catchments to understand how (hydropower) #reservoirs influence #streamflow extremes.
🔗 doi.org/10.1088/3033...
#hydrology
How do reservoirs influence streamflow extremes? Insights from a large-sample analysis in the Alpine Region - IOPscience
How do reservoirs influence streamflow extremes? Insights from a large-sample analysis in the Alpine Region, Götte, Jonas, Schlemper, Christopher, Zappa, Massimiliano, Brunner, Manuela I
doi.org
October 16, 2025 at 2:44 PM
How do reservoirs shape streamflow extremes in the Alps?
🌊 New paper from our team!
In his latest study, our #HYCLIMM member Jonas Götte and co-authors analyzed Alpine catchments to understand how (hydropower) #reservoirs influence #streamflow extremes.
🔗 doi.org/10.1088/3033...
#hydrology
🌊 New paper from our team!
In his latest study, our #HYCLIMM member Jonas Götte and co-authors analyzed Alpine catchments to understand how (hydropower) #reservoirs influence #streamflow extremes.
🔗 doi.org/10.1088/3033...
#hydrology
Reposted by John Hammond
Hot off the press: 'Spatially Compounding Drought-Flood Events Are Favored by Atmospheric Blocking Over Europe':
Link to full article: agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Link to full article: agupubs.onlinelibrary.wiley.com/doi/10.1029/...
October 6, 2025 at 3:00 PM
Hot off the press: 'Spatially Compounding Drought-Flood Events Are Favored by Atmospheric Blocking Over Europe':
Link to full article: agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Link to full article: agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by John Hammond
Just wanted to say that @ologies.bsky.social is one of my favorite podcasts I listen to with my wife & I was so happy she got a couple of rock ⭐s in our field to talk about #Hurricanes etc.
Just listened to parts 1 & 2. Both are great episodes & totally accessible to the general public. Bravo 👏
Just listened to parts 1 & 2. Both are great episodes & totally accessible to the general public. Bravo 👏
WE GOT HURRICANES 🌀
Stellar weather folks @drkimwood.bsky.social & @mattlanza.bsky.social chat:
-“deadlier” femme-named hurricanes
-anatomy of a cyclone
-the eyes have walls
-do we need a category 6?
-bonkers history
-Hurricane Hunters
-tracking the big ones
-cows
www.alieward.com/ologies/temp...
Stellar weather folks @drkimwood.bsky.social & @mattlanza.bsky.social chat:
-“deadlier” femme-named hurricanes
-anatomy of a cyclone
-the eyes have walls
-do we need a category 6?
-bonkers history
-Hurricane Hunters
-tracking the big ones
-cows
www.alieward.com/ologies/temp...
Tempestology (HURRICANES) Part 1 with Matt Lanza & Dr. Kim Wood — alie ward
Hurricanes. Typhoons. Cyclones. Tropical storms. Tropical depressions. What does it all MEAAAN? Let’s dive in. Career meteorologists Dr. Kim Wood of the University of Arizona and Space City Weather’s ...
www.alieward.com
August 13, 2025 at 6:25 PM
Just wanted to say that @ologies.bsky.social is one of my favorite podcasts I listen to with my wife & I was so happy she got a couple of rock ⭐s in our field to talk about #Hurricanes etc.
Just listened to parts 1 & 2. Both are great episodes & totally accessible to the general public. Bravo 👏
Just listened to parts 1 & 2. Both are great episodes & totally accessible to the general public. Bravo 👏
Reposted by John Hammond
Several groups have mobilized to offer assistance to people affected by the Guadalupe River floods. via @texaspublicradio.bsky.social
Guadalupe River flood: How to help and how to find help
Several groups have mobilized to offer assistance to people affected by the Guadalupe River floods.
www.tpr.org
July 6, 2025 at 4:30 PM
Several groups have mobilized to offer assistance to people affected by the Guadalupe River floods. via @texaspublicradio.bsky.social
Reposted by John Hammond
April 30, 2025 at 9:44 PM
Quinn Miller’s MS work is now out! onlinelibrary.wiley.com/doi/10.1002/...
May 8, 2025 at 3:47 PM
Quinn Miller’s MS work is now out! onlinelibrary.wiley.com/doi/10.1002/...
“Groundwater dominates snowmelt runoff and controls streamflow efficiency in the western United States” www.nature.com/articles/s43...
May 5, 2025 at 1:51 PM
“Groundwater dominates snowmelt runoff and controls streamflow efficiency in the western United States” www.nature.com/articles/s43...
“ROBIN: Reference observatory of basins for international hydrological climate change detection” www.nature.com/articles/s41...
April 21, 2025 at 2:51 PM
“ROBIN: Reference observatory of basins for international hydrological climate change detection” www.nature.com/articles/s41...
“What is a drought-to-flood transition? Pitfalls and recommendations for defining consecutive hydrological extreme events”
egusphere.copernicus.org/preprints/20...
egusphere.copernicus.org/preprints/20...
April 17, 2025 at 4:06 PM
“What is a drought-to-flood transition? Pitfalls and recommendations for defining consecutive hydrological extreme events”
egusphere.copernicus.org/preprints/20...
egusphere.copernicus.org/preprints/20...
StreamStats Delineations - Where are they?
This figure shows the density of delineations per 25 square kilometer grid for all delineations over the period 3/16/24-3/15/25. www.usgs.gov/media/images...
This figure shows the density of delineations per 25 square kilometer grid for all delineations over the period 3/16/24-3/15/25. www.usgs.gov/media/images...
April 16, 2025 at 4:27 PM
StreamStats Delineations - Where are they?
This figure shows the density of delineations per 25 square kilometer grid for all delineations over the period 3/16/24-3/15/25. www.usgs.gov/media/images...
This figure shows the density of delineations per 25 square kilometer grid for all delineations over the period 3/16/24-3/15/25. www.usgs.gov/media/images...
Reposted by John Hammond
New paper! After much work by me and my students we created a global database of hundreds of research watersheds, and perceptual models of their hydrologic processes. We use the data to test classic theories on how climate and landscape control dominant processes. www.nature.com/articles/s44...
Global patterns in observed hydrologic processes - Nature Water
This study presents a global, searchable database of 400 research watersheds with published descriptions of dominant hydrologic flow pathways, supporting efficient hypothesis testing to investigate em...
www.nature.com
April 6, 2025 at 4:24 PM
New paper! After much work by me and my students we created a global database of hundreds of research watersheds, and perceptual models of their hydrologic processes. We use the data to test classic theories on how climate and landscape control dominant processes. www.nature.com/articles/s44...
Reposted by John Hammond
Latest paper out of the WS hydrology lab! Here we show spatial variability in lithology is important for streamflow behavior and carbon export, but geogenic solute export behavior is similar. agupubs.onlinelibrary.wiley.com/doi/full/10....
The Role of Lithology on Concentration‐Discharge Relationships and Carbon Export in Two Adjacent Headwater Catchments
Bedrock lithology drives differences in streamflow and carbon export in adjacent catchments, controlling variability in shallow flow paths Both catchments display similar in-stream major ion conc...
agupubs.onlinelibrary.wiley.com
April 1, 2025 at 8:15 PM
Latest paper out of the WS hydrology lab! Here we show spatial variability in lithology is important for streamflow behavior and carbon export, but geogenic solute export behavior is similar. agupubs.onlinelibrary.wiley.com/doi/full/10....