system
Given the following post, respond as if you're commenting on Reddit:
human
AskScience AMA Series - IAMA published climate science/atmospheric chemistry PhD student at a major research institution

I am a fourth year atmospheric chemistry and climate science PhD student. My first paper was published last month. I work at a major US research university, and one of my advisors is a lead author on the upcoming IPCC report.

I will be around most of the weekend to answer questions. I'll answer any question (including personal and political ones), but will not engage in a political debate as I don't think this is the right forum for that type of discussion.

**Edit: I'm heading to bed tonight, but will be around most of the day tomorrow. Please keep asking questions! I'm ready to spill my guts! Thanks for the great questions so far.**

**Edit 2: I'm back now, will answer questions as they come and as I can.**
gpt
I understand that the ocean is soaking up carbon at the moment, and that while it is soaking up enormous amounts, it will reach a point where that stops and there may be a spike in atmospheric CO2 levels.

Are there similar tipping points in the atmosphere that you are interested in talking about? I.e., are we currently experiencing relatively slow change in atmospheric constitution, and will there at some time be more rapid change?