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Climate and landform interact to control the source and transport of nitrate in Pacific Northwest rivers

التفاصيل البيبلوغرافية
العنوان: Climate and landform interact to control the source and transport of nitrate in Pacific Northwest rivers
المؤلفون: Elizabeth J. Elmstrom, Gordon W. Holtgrieve, Mark D. Scheuerell, Andrew J. Schauer, Karrin Leazer
المصدر: Communications Earth & Environment, Vol 5, Iss 1, Pp 1-13 (2024)
بيانات النشر: Nature Portfolio, 2024.
سنة النشر: 2024
المجموعة: LCC:Geology
LCC:Environmental sciences
مصطلحات موضوعية: Geology, QE1-996.5, Environmental sciences, GE1-350
الوصف: Abstract The hydrological effects of climate change are documented in many regions; however, climate-driven impacts to the source and transport of river nutrients remain poorly understood. Understanding the factors controlling nutrient dynamics across river systems is critical to preserve ecosystem function yet challenging given the complexity of landscape and climate interactions. Here, we harness a large regional dataset of nitrate (NO3 –) yield, concentration, and isotopic composition (δ15N and δ18O) to evaluate the strength of hydroclimate and landscape variables in controlling the seasonal source and transport of NO3 –. We show that hydroclimate strongly influenced the seasonality of river NO3 –, producing distinct, source-dependent NO3 – regimes across rivers from two mountain ranges. Riverine responses to hydroclimate were also constrained by watershed-scale topographic features, demonstrating that while regional climate strongly influences the timing of river NO3 – transport, watershed topography plays a distinct role in mediating the sensitivity of river NO3 – dynamics to future change.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2662-4435
Relation: https://doaj.org/toc/2662-4435
DOI: 10.1038/s43247-024-01235-8
URL الوصول: https://doaj.org/article/5f12f5a7e47c4cdd90a6a3774f4f5854
رقم الانضمام: edsdoj.5f12f5a7e47c4cdd90a6a3774f4f5854
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:26624435
DOI:10.1038/s43247-024-01235-8