Published September 29, 2020
| Version v1
Publication
Open
Soil moisture dominates dryness stress on ecosystem production globally
Creators
- 1. ETH Zurich
- 2. Peking University
Description
Dryness stress can limit vegetation growth and is often characterized by low soil moisture (SM) and high atmospheric water demand (vapor pressure deficit, VPD). However, the relative role of SM and VPD in limiting ecosystem production remains debated and is difficult to disentangle, as SM and VPD are coupled through land-atmosphere interactions, hindering the ability to predict ecosystem responses to dryness. Here, we combine satellite observations of solar-induced fluorescence with estimates of SM and VPD and show that SM is the dominant driver of dryness stress on ecosystem production across more than 70% of vegetated land areas with valid data. Moreover, after accounting for SM-VPD coupling, VPD effects on ecosystem production are much smaller across large areas. We also find that SM stress is strongest in semi-arid ecosystems. Our results clarify a longstanding question and open new avenues for improving models to allow a better management of drought risk.
Translated Descriptions
⚠️
This is an automatic machine translation with an accuracy of 90-95%
Translated Description (Arabic)
يمكن أن يحد إجهاد الجفاف من نمو الغطاء النباتي وغالبًا ما يتميز بانخفاض رطوبة التربة وارتفاع الطلب على المياه في الغلاف الجوي (نقص ضغط البخار). ومع ذلك، لا يزال الدور النسبي للإدارة السليمة بيئياً وللأمراض التي يمكن الوقاية منها باللقاحات في الحد من إنتاج النظام الإيكولوجي موضع نقاش ويصعب فصله، حيث يتم الجمع بين الإدارة السليمة بيئياً والأمراض التي يمكن الوقاية منها باللقاحات من خلال التفاعلات بين الأرض والغلاف الجوي، مما يعوق القدرة على التنبؤ باستجابات النظام الإيكولوجي للجفاف. هنا، نجمع بين ملاحظات الأقمار الصناعية للفلورة الناجمة عن الطاقة الشمسية وتقديرات SM و VPD ونظهر أن SM هو المحرك المهيمن لضغط الجفاف على إنتاج النظام البيئي عبر أكثر من 70 ٪ من مناطق الأراضي النباتية مع بيانات صالحة. علاوة على ذلك، بعد حساب اقتران الأمراض التي يمكن الوقاية منها باللقاحات، تكون تأثيرات الأمراض التي يمكن الوقاية منها باللقاحات على إنتاج النظام الإيكولوجي أصغر بكثير عبر مناطق واسعة. نجد أيضًا أن إجهاد SM هو الأقوى في النظم الإيكولوجية شبه القاحلة. توضح نتائجنا سؤالًا قديمًا وتفتح طرقًا جديدة لتحسين النماذج للسماح بإدارة أفضل لمخاطر الجفاف.Translated Description (English)
Dryness stress can limit vegetation growth and is often characterized by low soil moisture (SM) and high atmospheric water demand (vapor pressure deficit, VPD). However, the relative role of SM and VPD in limiting ecosystem production remains debated and is difficult to disentangle, as SM and VPD are coupled through land-atmosphere interactions, hindering the ability to predict ecosystem responses to dryness. Here, we combine satellite observations of solar-induced fluorescence with estimates of SM and VPD and show that SM is the dominant driver of dryness stress on ecosystem production across more than 70% of vegetated land areas with valid data. Moreover, after accounting for SM-VPD coupling, VPD effects on ecosystem production are much smaller across large areas. We also find that SM stress is strongest in semi-arid ecosystems. Our results clarify a longstanding question and open new avenues for improving models to allow a better management of drought risk.Translated Description (Spanish)
Dryness stress can limit vegetation growth and is often characterized by low soil moisture (SM) and high atmospheric water demand (vapor pressure deficit, VPD). However, the relative role of SM and VPD in limiting ecosystem production remains debated and is difficilet to disentangle, as SM and VPD are coupled through land-atmosphere interactions, hindering the ability to predict ecosystem responses to dryness. Here, we combine satellite observations of solar-induced fluorescence with estimates of SM and VPD and show that SM is the dominant driver of dryness stress on ecosystem production across more than 70% of vegetated land areas with valid data. Moreover, after accounting for SM-VPD coupling, VPD effects on ecosystem production are much smaller across large areas. We also find that SM stress is strongest in semi-arid ecosystems. Our results clarify a longstanding question and open new avenues for improving models to allow a better management of drought risk.Files
s41467-020-18631-1.pdf.pdf
Files
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Additional details
Additional titles
- Translated title (Arabic)
- تهيمن رطوبة التربة على إجهاد الجفاف على إنتاج النظام الإيكولوجي على مستوى العالم
- Translated title (English)
- Soil moisture dominates dryness stress on ecosystem production globally
- Translated title (Spanish)
- Soil moisture dominates dryness stress on ecosystem production globally
Identifiers
- Other
- https://openalex.org/W3091303025
- DOI
- 10.1038/s41467-020-18631-1
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