Dear Critical Zone community,
Please consider submitting an abstract to Geological Society of America (GSA) Connects session T58: Water Storage and Transit in Bedrock and Implications for Critical Zone Evolution, Stream Chemistry, Climate, and Ecosystems.
Dear Critical Zone community,
The American Geophysical Union is seeking an editor-in-chief for the journal Global Biogeochemical Cycles. An ad is attached below. I’m on the search committee for this position and I’m happy to answer any questions you might have. It’s a great opportunity for the right person.
If this sounds like you, or like someone you know, please encourage them to apply. We would be especially grateful for applicants that helped broaden the population of editors in chief.
Geohydrology Internship Program (paid summer research for undergrad or grad students)
Pacific Northwest National Laboratory (PNNL) in Richland, WA is seeking a highly motivated post-masters research associate with a strong background centered around riverbed sediments, surface waters, or soils in terms of (1) detailed molecular properties of organic matter (e.g., assayed via mass spec, NMR, or other high resolution methods), (2) aerobic and anaerobic biogeochemistry, (3) integration of multi-omic data (e.g., metagenomics, metatranscriptomics, metametabolomics) with metabolic m
Pacific Northwest National Laboratory (PNNL) in Richland, WA is seeking a highly motivated postdoctoral research associate with a strong background centered around riverbed sediments, surface waters, or soils in terms of (1) detailed molecular properties of organic matter (e.g., assayed via mass spec, NMR, or other high resolution methods), (2) aerobic and anaerobic biogeochemistry, (3) integration of multi-omic data (e.g., metagenomics, metatranscriptomics, metametabolomics) with metabolic m
Pacific Northwest National Lab has an exciting opportunity for a post-masters intern to work with an interdisciplinary team, with a focus on biogeochemistry, microbiology, and hydrology. Part of this position will contribute to the global WHONDRS consortium (whondrs.pnnl.gov).
This position closes soon, March 28th, so please apply today!
Link to the job ad: https://t.co/XobPGiCXpk
We look forward to working with you,
Post Doctorate RA - Soil Microbiome Bioinformatics in RICHLAND, Washington
Krycklan Catchment Study (KCS) is the most instrumented and well-studied meso-scale catchment in the boreal region. The 70 km2 KCS builds on three decades of catchment science that grew up around the Svartberget field station and is currently one of the most ambitious projects integrating water quality, hydrology, and aquatic ecology in running waters in the north. At present, KCS includes 18 intensively instrumented and continuously monitored sub-catchments, an extensive soil sampling program, comprehensive lake carbon-balance studies, several long-term field experiments, and a large set of ancillary data. To date, close to 20,000 stream and soil water samples have been collected (with duplicate sample archived in freezer) and analyzed providing approximately 10 million unique water chemistry observations. At the center of the catchment the 150 m ICOS (pan-European Integrated Carbon Observatory System) research tower is placed for measuring exchange of energy, water and carbon that will allow for one of the best assessments of full carbon balance at a landscape scale that presently exists anywhere in the world. At presently over 100 research projects are being conducted involvning several hundered researchers from all over the world.
The Mezquital valley, 80 km north of the metropolitan area of Mexico City (MAMC), is an example of a low cost Soil-Aquifer-Treatment system, in which untreated sewage and surface runoff collected within the closed basin of Mexico, are used to irrigate mainly fodder crops and maize. The valley is at 2100 m asl, and has a temperate semi-arid climate. Natural vegetation corresponds to xerophytic shrublands, but irrigation has changed the natural hydrologic environment and the land cover. Today more than 90,000 ha are cultivated mainly with lucerne and maize cropped in rotation. The soil moisture regime has changed from ustic to udic, and there is an artificial groundwater recharge of 6 m3/s of the semi-confined upper aquifer. Supply water for more than 500,000 inhabitants of the valley is provided by this semi-confined aquifer.
Our working group manages a critical zone observatory in this area since 1990. The objective is to evaluate the impact of long-term irrigation on the soil, crop, groundwater and air quality in the region. We also collaborate in assessing the impact on human health. We do this following two main strategies:
We have repeatedly sampled fields irrigated for different lengths of time with untreated wastewater in 1990 and 2009, respectively. Fields are distributed among the dominant soil types, namely Leptosols, Phaeozems and Vertisols (Calciustolls and Pellusterts). In these fields we have sampled soils (by genetic horizon and also composite samples from the upper 30 cm) and crops, and have analyzed them for nutrients and pollutants as heavy metals, pharmaceuticals, detergents and salts. We have also studied the microbial communities and their activity.
Since 2008 we are monitoring critical zone processes during single irrigation events to follow groundwater recharge, nutrient and pollutant leaching as well as greenhouse gas emissions. This has been done along a transect crossing the extended piedmont of the valley. We have installed deep piezometers (30 and 25 m deep), observation wells (at 1, 2, 4 and 5 m depth) and suction cup lysimeters in the first 4 dm of the soil. We also installed gypsum blocks, TDR probes, tensiometers to follow moisture contents and water tension; Pt-electrodes to monitor redox potentials and static chambers to measure gas emissions.
We also have sampled fields and monitored processes in rain-fed agricultural fields as well as in plots covered by the natural vegetation for comparison.