Now out: our @EnvSciTech paper using high-frequency data to assess conductivity and chloride in the eastern US.
https://t.co/TxDTI8gNCL
Summarized in a clickable map:
https://t.co/h6HHFgF3K6
with
@HydroRho
& Andy Sekellick
@USGS_MD_DE_DC
(1/n)
Our paper @RockLinnea @hildug is out in L&O Letters @aslo_org: "Impact of salinization on lake stratification and spring mixing". We used buoy data, a theoretical and a modeling approach to quantify effects of salt on Mendota&Monona
https://t.co/J01UVIhxB2
Hats off to @hydrobert for leading this wonderful paper. It was a fun undertaking and has a little bit of something for everyone... observational data, theory, and modeling!
There's a lot of data and code - and it's all available here: https://t.co/v4V4ShGolX
@LowSulfate@RiverChem @revelethBGC I purchased a Mettler Toledo G20 titrator several years ago with a Rondolino auto sampler (9 samples). It was the only multi-sample solution that I could find that wasn’t outrageously expensive (>$20-25K). We do end point titration to pH 3.5 & manually calc alk
If you’re a hydrogeologist who’s attending #GSA2021, you may be eligible to participate in a study investigating the use of spatial thinking in hydrogeology to enhance hydrogeology education. Participants will receive a $100 gift card. Learn more at
https://t.co/ZpNH1E51AH
More details: I’m involved in this study that’s being led by a fantastic pre-tenure colleague Peggy McNeal in collaboration with colleagues at Western Michigan: Heather Petcovic, Matt Reeves, & Timi Stephens-Popoola.
https://t.co/3FYMUdkiih
https://t.co/2CdTZmghol
If you’re a hydrogeologist who’s attending #GSA2021, you may be eligible to participate in a study investigating the use of spatial thinking in hydrogeology to enhance hydrogeology education. Participants will receive a $100 gift card. Learn more at
https://t.co/ZpNH1E51AH
@waterbarnes @RiverChem In addition to my general interest, on the urban Critical Zone project, we’re measuring pH + alkalinity (which I plan to model pCO2 from) as well as dissolved CO2 (via GC I think? whatever, the NEON method is). So I’m starting to think about the comparison of those data
@waterbarnes @RiverChem Make sense on circumneutral waters & stability.
Yeah, I could never entirely wrap my brain around:
Degassing/exch of CO2 doesn’t affect alkalinity
But also
Be absolutely sure there’s no headspace
@LowSulfate@RiverChem A few papers over the last decade have discussed the challenges of carbonate versus non-carbonate contributions to alkalinity in freshwater, but the places where non-carb is much of a factor tend to be really dilute systems with high DOC, e.g., northern New England or boreal.
@LowSulfate@RiverChem I’ve predominantly sampled in silicate-bedrock dominated systems (though starting to sample a few carbonate streams now). So most of my streams, even if urban and relatively high alkalinity vs bkgd, aren’t carbonate streams/ grdwaters where carbonate precipitation might occur
@waterbarnes @RiverChem My previous tweet should have read “in what sort of (biogeochemical) [environments] have you seen…
I’m going to have my students collect a few unfiltered samples in the next couple of sampling rounds to compare filtered & unfiltered.
@waterbarnes @RiverChem Really interesting! @waterbarnes, in what sort of (biogeochemical) have you seen the biggest differences between filtered/unfiltered? I’ve always done titrations on filtered (because I was trained by geochemists).