Ocean and Lake Sediments
Timeline of ocean and lake sediments
What is millions of years to recent times?
Percentage of organic matter.
What is 80-100%?
Timeline.
What is decades to millions of years?
Important to understand.
What is historical aerosols?
Aerosol input from the atmosphere and weathering and biogenic material.
What is composition of Ocean and Lake sediments?
Formation.
What is standing/slow moving water and high rainfall with cool climates?
Ice cores are found.
What is glaciers or semi permanent ice?
Modeling can help us understand 4 aerosol interactions.
What are Aerosol-climate interactions, Aerosol lifetime, Radiative forcing, Source contributions
Tell scientists the long term effects of.
What is dust, volcanism, black carbon and pollen.
What is Hydeoseral succession?
Can show past temperatures, and precipitation.
What are isotopic ratios?
The IPCC defines this, “as the change in the top of atmosphere radiative balance due to the addition of a species” (Mahowald et. al., 2023)
What is radiative forcing?
Deposition rate.
What is 0.05-0.1 mm/yr?
Peatlands contain.
What is carbon?
Aerosols are incorporated as insoluble/dissolved material in precipitation which are settled in the ice core on the ice matrix or in between the different layers
What is wet deposition?
Desert and agricultural dust proxies.
What are ice cores and marine and terrestrial sediments?
Much easier to core.
What is lake sediment cores?
What is Lead, Mercury, Molybdenum, Thorium, Uranium, Copper, Arsenic, Antimony?
Name 2 aerosols in ice cores.
What is black carbon and dust?
Wildfire proxies.
What are ice cores, tree ring scars and speleothems