More Frequent Runoff and Connected Sources in Headwaters Promote Browning of Northern Freshwaters DOI Creative Commons
Stefano Basso, Andréas Musolff, Heleen A. de Wit

и другие.

Environmental Science & Technology Letters, Год журнала: 2024, Номер 12(1), С. 51 - 56

Опубликована: Дек. 11, 2024

Sustained browning of northern waters has prompted inquiries into the drivers increasing concentrations organic matter. While reduced sulfur deposition is a key cause, an role hydrologic mechanisms as result cleaner air and progressing climate change been repeatedly suggested. How these controls act remains however unclear. Here we examine over 30 years carbon concentration discharge data from four reference streams located across Norway to pinpoint consistent changes that may promote water browning. Stable slopes with changing intercepts concentration-discharge relations indicate influence pollution on soil solution chemistry plausible, supporting available chemical explanations perspective. Decreasing ratios variability, observed in autumn years, point less spatial heterogeneity sources carbon. A clear rise frequency runoff events, which increases opportunities for dissolved transit streams, also indicates higher connectivity more even mobilization sources. More connected frequent jointly enhance likelihood reaching rivers, thus contribute waters.

Язык: Английский

The Role of Lithology on Concentration‐Discharge Relationships and Carbon Export in Two Adjacent Headwater Catchments DOI Creative Commons

L. Giggy,

Margaret Zimmer

Water Resources Research, Год журнала: 2025, Номер 61(4)

Опубликована: Март 29, 2025

Abstract Headwater catchments have strong impacts on downstream waterways, near‐shore ecosystems, and the quality of water available for growing human populations. Thus, understanding how solutes are exported through these upland landscapes is critically important. A body literature highlights interaction topography, climate, critical zone structure as a key control streamflow chemical export. However, more focused work needed to pinpoint variability in subsurface across lithologically complex regions signals at catchment outlets. Here, we aim better understand lithology zones modulate response solute export patterns two central coastal California headwater that similar vegetation, climate but different lithologies. We monitored collected surface samples outlets dissolved major ions organic carbon (DOC) consecutive years. The with mélange bedrock displayed much flashier hydrologic behavior 7.8 times higher peak flow values 1.9 mean event concentrations DOC, suggesting shorter shallower paths likely arise from bedrock. Despite distinct DOC export, ion were broadly chemostatic, which may be driven by rapid reactions both catchments. Our contributes building an integrated subtle differences can profound routed

Язык: Английский

Процитировано

1
Identifying the determinants of the spatial patterns and temporal fluctuation characteristics of riverine pCO2 of the largest subtropical river using machine learning methods DOI Creative Commons

Menghan Chen,

Lei Cheng,

Li‐Wei Chang

и другие.

Journal of Hydrology Regional Studies, Год журнала: 2025, Номер 58, С. 102284 - 102284

Опубликована: Март 8, 2025

Язык: Английский

Процитировано

0
More Frequent Runoff and Connected Sources in Headwaters Promote Browning of Northern Freshwaters DOI Creative Commons
Stefano Basso, Andréas Musolff, Heleen A. de Wit

и другие.

Environmental Science & Technology Letters, Год журнала: 2024, Номер 12(1), С. 51 - 56

Опубликована: Дек. 11, 2024

Sustained browning of northern waters has prompted inquiries into the drivers increasing concentrations organic matter. While reduced sulfur deposition is a key cause, an role hydrologic mechanisms as result cleaner air and progressing climate change been repeatedly suggested. How these controls act remains however unclear. Here we examine over 30 years carbon concentration discharge data from four reference streams located across Norway to pinpoint consistent changes that may promote water browning. Stable slopes with changing intercepts concentration-discharge relations indicate influence pollution on soil solution chemistry plausible, supporting available chemical explanations perspective. Decreasing ratios variability, observed in autumn years, point less spatial heterogeneity sources carbon. A clear rise frequency runoff events, which increases opportunities for dissolved transit streams, also indicates higher connectivity more even mobilization sources. More connected frequent jointly enhance likelihood reaching rivers, thus contribute waters.

Язык: Английский

Процитировано

0