The nature of the early martian climate remains unsolved. Geologic evidence, including valley networks, paleolakes, and groundwater release, suggest that the long-lived (Noachian-spanning) early climate …
Diverse hydrous minerals have been identified on Mars and suggest a rich history of water-rock interactions in a variety of aqueous environments. Fe/Mg clays and …
Today, more than any preceding time, understanding the response of terrestrial ecosystems to changes in climate is imperative due to the extremes to which we, …
This thesis investigates the diversity and ecology of alkenone-producing haptophyte algae. Focusing on lake-dwelling haptophytes, this thesis describes the paleoclimate implications of haptophyte diversity. Additionally, …
The nature of the early Mars climate is currently debated. Geologic evidence from valley networks and crater basin paleolakes suggests that early Mars (the Noachian …
Past hydroclimatic change is shown from the reconstruction of paleo-lake levels from New Long and Rocky Ponds in southeastern Massachusetts, and Davis Pond in western …
The Songliao Basin in Northeast China contains one of the most complete terrestrial sedimentary records of the Cretaceous and represents an important terrestrial paleoclimate archive. …
The availability of nutrients in surface waters, including inorganic nitrogen (N) (i.e., nitrate (NO3-), nitrite (NO2-), and ammonium (NH4+)), regulates estuarine and ocean primary production. …
Understanding the characteristics and drivers of climate variations is imperative to advancing our knowledge about the evolution and changes of the Earth system. The Holocene …
The Peru margin plays a significant role in global climate dynamics and biogeochemical cycling. Situated between 4-15°S off the western coast of South America the …
Reactive nitrogen gases (e.g., NOx = NO + NO2) emitted to the atmosphere eventually return to the surface environment as nitrate (NO3-) deposition, which causes …
Ocean surface gravity waves, especially the resulting Langmuir turbulence, affect the ocean surface vertical mixing, yet are missing in most of the global climate models …
The Indian Summer Monsoon (ISM) is vital to over one-fifths of the world’s population who depend upon monsoonal rains. Recently collected marine sediment cores offer …
Leaf wax D/H ratios are widely used to reconstruct environmental water D/H ratios in paleoclimatology. However, accurate quantitative assessment of precipitation D/H ratios from sedimentary …
Inland waters (lakes, rivers, reservoirs, wetlands) are the largest natural source of the greenhouse gas methane, representing 40-50% of total emissions. Emission sources are characterized …
Moist convection fundamentally influences Earth’s climate, particularly through precipitation and clouds. However, continental moist convection is poorly represented in global climate models, and the land …
The question of how to interpret precipitation isotope records in East Asia is an ongoing debate and has implications for understanding climate dynamics in East …
There is substantial geologic evidence, including extinct valley networks and paleolakes, for a period of increased aqueous activity on the surface of Mars prior to …