Flow-weighted sourcing of freshwater runoff from Pacific-draining continental and coastal basins in south-western Patagonia (41-56° S): characterizing regional inputs to Chilean fjords

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Сен. 19, 2024

Global estimates of the supply dissolved and suspended materials to ocean, in order be relevant at either political or ecological scales, belie a finer-scale analysis necessary for understanding specific terrestrial-marine interactions. This is especially true continental runoff marine critical zone inland fjords channels, where mechanisms, drivers, predictions need elaborated context changing land use shifting climate forcing. In south-western Patagonia, from small coastal large basins (~310 x10 3 km 2 ), sourced diverse geography wide climatic gradient (<150 – 6,000+ mm/year), correspond with very low density hydrological water quality observations. Based on recently developed regional model (FLOW), we estimated freshwater discharges characterized flow-weighted sourcing (land use-cover type, climate, glaciers/geology, soil province) Pacific drainages 41° 56° south latitude. An 692 /year (mean across 1979-2018), 2% worldwide total, more than 85% previous much larger South American input. limited observations inference sourcing, predict general patterns export four groups resources important productivity, including: significant variation flow seasonality, N-S declining input silicic acid increased glacial sediment iron, potential shift organic matter sources rainforest (potentially labile) peatlands (refractory). Finally, emphasize temporal spatial consequences near-reference condition river ecosystem productivity function Patagonian fjords, recommendations standards sustained monitoring coupled ecosystems.

Язык: Английский

Surface Water Chemistry as an Integrated Signal of Ecosystem Vectors and Critical Zone Reactors

Опубликована: Янв. 1, 2024

Язык: Английский