7 papers analyzed
These studies suggest that the water in the ocean comes from a combination of nebular origins, adsorption onto dust grains, and contributions from various water flows and sources such as density flows, Atlantic Water, and Circumpolar Water.
The origin of Earth's ocean water has been a subject of extensive research and debate. Various hypotheses have been proposed, ranging from delivery by extraterrestrial bodies to internal geological processes. This synthesis aims to consolidate the key insights from multiple research papers to provide a comprehensive understanding of where the water in the ocean comes from.
Carbonaceous Chondrites (CCs) and Comets:
Hydrogen-Rich Atmosphere and D/H Evolution:
Primordial Water in Earth's Mantle:
Water Distribution and Early Planetary Differentiation:
Extraterrestrial Delivery and Late Accretion:
The origin of Earth's ocean water is likely a combination of multiple sources. Carbonaceous chondrites and water-rich planetesimals from the asteroid belt appear to be significant contributors. The early Earth’s hydrogen-rich atmosphere and subsequent geological processes have also played a role in shaping the current D/H ratio of ocean water. Additionally, some water may have been inherited directly from the protosolar nebula and stored in the deep mantle. Overall, the evidence points to a complex interplay of extraterrestrial delivery and internal geological processes in the formation of Earth's oceans.
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