Question

What can Antarctic ice core samples tell us about atmospheric CO2 levels? (Select all that apply.)1. Ice cores can help scientists estimate atmospheric CO2 levels from centuries ago.2. Nothing, because ice is made of H2O and not CO2.3. CO2 ice core data confirm CO2 measurements taken directly from the atmosphere.4. Ice cores can tell scientists exactly what plants lived on Earth centuries ago.

Answer 1

Antarctic ice core samples tell us about atmospheric CO2 and help scientists estimate atmospheric CO2 levels from centuries ago.

Explanation:

Analysis of retained gases in Antarctic ice, through perforations of over 2000 meters deep, has allowed knowing about the CO2 atmospheric concentrations and other gases involved in the greenhouse effect for centuries ago. These concentrations have varied in the temporal scale of glaciation, showing low concentrations during glacial periods with low temperature, and relatively high concentrations during interglacial periods with high temperature. Between these two periods, abrupt variations on temperature and gas concentration are detected, meaning that changes in CO2 cause changes in temperature.

The increase in CO2 is a highly important component in global climatic change and possibly the best documented. This information is the best paleoclimatic documents that complement with others such as marine sediments and tree rings, letting know about the principal traits of terrestrial weather in the lasts 420,000 years or more, practically four glacial-interglacial cycles.

Answer 2

Antarctic ice core samples tell us about atmospheric CO2 and help scientists estimate atmospheric CO2 levels from centuries ago.

Step-by-step explanation:

Analysis of retained gases in Antarctic ice, through perforations of over 2000 meters deep, has allowed knowing about the CO2 atmospheric concentrations and other gases involved in the greenhouse effect for centuries ago. These concentrations have varied in the temporal scale of glaciation, showing low concentrations during glacial periods with low temperature, and relatively high concentrations during interglacial periods with high temperature. Between these two periods, abrupt variations on temperature and gas concentration are detected, meaning that changes in CO2 cause changes in temperature.

The increase in CO2 is a highly important component in global climatic change and possibly the best documented. This information is the best paleoclimatic documents that complement with others such as marine sediments and tree rings, letting know about the principal traits of terrestrial weather in the lasts 420,000 years or more, practically four glacial-interglacial cycles.