yego.me
yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

What Are Tundras? | National Geographic

less than 1m read
·Nov 11, 2024

What are tundras? Tundras are among the Earth's coldest and harshest biomes. These ecosystems are treeless regions with extreme cold and low rainfall.

There are two different types of tundras: alpine and arctic. Alpine tundras occur on mountains where trees cannot grow in the high altitudes. There, the growing season is about 180 days. Mountain goats, sheep, marmots, and birds feed on low-lying plants and insects.

Arctic tundra extends from the edge of the Arctic Ocean down to the coniferous forest of the taiga. Permafrost prevents trees from taking root, but shrubs and other vegetation grow during the short summers, which range from 50 to 60 days. A variety of wildlife, including arctic foxes, polar bears, and caribou, live in the arctic tundra.

Global warming is changing the arctic tundra, and the changing tundra is contributing to global warming. The Arctic's permafrost is deteriorating, which alters not only the landscape but also the plants and animals that can live there.

In addition, permafrost contains about 14% of the Earth's carbon, so as it melts, that carbon is released into the atmosphere, contributing to global warming.

The Philosophy Of Cold Showers
Tim Brady - How Much Equity Should I Give My First Employees?

More Articles

View All
Polynomial special products: difference of squares | Algebra 2 | Khan Academy
Earlier in our mathematical adventures, we had expanded things like ( x + y \times x - y ). Just as a bit of review, this is going to be equal to ( x \times x ), which is ( x^2 ), plus ( x \times \text{negative } y ), which is negative ( xy ), plus ( y \t…
Federalist No. 10 (part 1) | US government and civics | Khan Academy
In other videos, we have talked about how ratification of the U.S. Constitution to replace the Articles of Confederation was not a slam dunk. After the Constitution was drafted during the Constitutional Convention in mid-1787, you actually have a signific…
How to Calculate the Intrinsic Value of a Stock (Full Example)
Warren Buffett says the three most important words in investing are “margin of safety.” It’s no doubt the margin of safety is an integral concept used extensively by value investors, both past and present. We’re talking people like Charlie Munger, Warren …
Worked example: Derivative of cos_(x) using the chain rule | AP Calculus AB | Khan Academy
Let’s say we have the function f of x, which is equal to cosine of x to the third power. We could also write it like this: cosine of x to the third power. We are interested in figuring out what f prime of x is going to be equal to. So, we want to figure o…
How a Fish Might Grow Your Next Salad | Decoder
This is a seed. It doesn’t look like much right now, but if you … put it in the ground, give it some water, fight off invaders, and wait a little while… After a few weeks with a little luck, you might end up with a head of lettuce. That’s a lot of work fo…
A message from Sal Khan for the Khan Academy 2016 Annual Report
Welcome to the KH Academy 2016 annual report. In the actual text of the report, we’re going to go into a lot more detail on the financials and other things, but I’m hoping here to give you an overview, big picture. 2016 was a great year for KH Academy. T…