"Consequences of environmental change" was the prompt provided to #mindjourney to generate this image.

The prompt is a quote from "Catchment and Critical Zone Science – Understanding Ecosystems Through Monitoring, Analysis, and Experimentation II" the fourth of four sessions convened today at #AGU22.

🔗 🗓️ https://bit.ly/3Wn27i6

We'll be replying to his post as we post live from our final session at #AGU2022.

Catchment and Critical Zone Science – Understanding Ecosystems Through Monitoring, Analysis, and Experimentation II Oral

Catchment, critical zone, and ecosystem studies are foundational to hydrological and biogeochemical process understanding. These place-based studies with sustained monitoring have shaped our understanding of fundamental processes and consequences of environmental change on ecosystems. They also inform environmental policy and lead to transformative ideas that advance science and benefit society. In this session we seek contributions that synthesize hydrologic and biogeochemical findings and concepts, including across sites and over time. We encourage contributions from catchment, critical zone, and observatory studies, particularly research programs that are crucial to scientific discovery, resource management, shaping policy, or promoting societal well-being.

AGU - Fall Meeting 2022

"It's a vibrant community," says session organizer Stephen D Sebestyen about his work to strength the catchment community. Big Data Cluster collaborator Jamie Shanley is part of this effort as well.

Sebestyen has been convening a session like the four held today to bring #CriticalZone catchment researchers together at the American Geophysical Union annual fall meeting since 2008. "We want to see who's joined the ranks, what you're working on, and grow our community."

#AGU22

The first presentation in the session is from Sidney Bush who just received their Ph D from University of Colorado Boulder.

The work shared at #AGU22 examines where water comes from in a stream. Their findings seem to indicate that the upstream inputs into the stream are greatest in the spring, "our esults indicate that contributions from upstream source areas become less important than lateral inputs from spring snowmelt into the fall return to baseflow."

https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1126422

Dominant Source Areas Shift Seasonally from Longitudinal to Lateral Contributions in a Montane Headwater Stream

Montane ecoregions are important vehicles for downstream hydrologic function, b...

AGU - Fall Meeting 2022

Session conveners and moderators are faced with a couple of presenters who were unable to attend the meeting.

That means staying on track for online attendees who may want to access the meeting at the scheduled time. Great and inclusive moderating technique. #AGU22 #AGU2022

Presentations begin again with Amanda Pennino and collaborators.

They became curious about how water moves through a watershed's #CriticalZone after a storm. How much does a storm mix up the stuff in the catchment. "Our results show that upslope soils that drained from organic-rich soils frequently saturated to shallow depths, had waters that were markedly more acidic and exhibited higher DOC concentrations than downslope counterparts."

More in their #AGU22 abstract: https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1166082

Hydrodynamic drivers of hillslope soil DOC concentrations during storm events

It is well recognized that the contribution of solutes from hillslope soils to ...

AGU - Fall Meeting 2022
More flexibility and resiliency on display as the session continues. This time the presenter has recorded their presentation, having tested positive for COVD just before the start of #AGU22. A sure sign that the pandemic continues to have the power to affect change without warning.

Bryn Stewart is a #BigDataCluster member who's based at #PennState. Stewart is presenting work conducted by the Big Data Cluster at #AGU22.

Stewart reports on data collected from Sleepers River Research Watershed, "we hypothesize that both disturbances (recovery from acidification and climate change) will affect solute concentrations, but recovery from acidification will be more influential for DOC, while the relatively stable DIC trends are maintained by lithological influence."

The final presentation of the series of four sessions discussing Catchment and Critical Zone Science begins at #AGU22.

"Dissolved organic carbon is increasing in concentration in streams draining watersheds in many regions. The drivers of these increasing concentrations are uncertain. Here we examine the watershed characteristics that may play a role in driving these changes in stream and river chemistry."

Our work studying the #CriticalZone will continue.