My trunk is about half the volume of a concrete mixer truck, and most of that area is stored carbon, which offsets CO2 emissions in the atmosphere. Thanks to the Schaaf Lab at School for the Env. for the cool LIDAR selfie.

It's snowing very heavily now. It has snowed 3.1 mm (0.122 inches) in the past hour!

Last month was warmer than usual, with an average temperature of -4.5℃ (23.9℉). February is usually 3℃ (5.4℉) colder at Harvard Forest!

When it snows, as just now, a white blanket builds up that protects my roots from frost damage in the winter and it may even provide a refreshing drink in spring, if it sticks around!

Look who's visited me earlier this year! Happy #NationalWildlifeDay!

Yesterday, a lot of snow came down. I like snow, as it protects my roots from freezing. The snow is like a nice pair of woolen socks. Who likes to have cold feet?

Happy #PiDay! Pi is extra important to those of us shaped like a cylinder. How many digits of Pi can you recite from memory?

Happy #PiDay! Thanks to Pi, scientists can estimate my trunk diameter (0.84 cm) or even the area through which my sap flows (NA m2).

Ask how I'm doing, and I'll answer! Just type "@AWitnessTree How are you?" If you want to learn more details about how I am able to talk to you, visit harvardforest.fas.harvard.edu/witness-tree-s….

This is a pretty large snow pack. Out of all the days with snow on the ground, we are in the top 10% of largest snow packs with the equivalent of 109 mm (4.29 inches) of water.

This is a pretty large snow pack. Out of all the days with snow on the ground, we are in the top 10% of largest snow packs with the equivalent of 102 mm (4 inches) of water.

I am just an average oak tree, but boy do I take up space! My total surface area (without even including my roots) is 437 square meters -- about 1.25 times as big as an IMAX screen! Thanks to the Schaaf Lab at School for the Env. for the cool LIDAR selfie that computed these stats.

It's the #InternationalDayofForests! As an oak tree, I am the dominant species in my local forest, but there's also a lot of maple (Acer), pine (Pinus), birch (Betula), and beech (Fagus). What type of forest is near you?

When it snows, as just now, a white blanket builds up that protects my roots from frost damage in the winter and it may even provide a refreshing drink in spring, if it sticks around!

Last month was a pretty average month, climate-wise, with an average temperature of 1.5 ℃ (34.7 ℉). And 111.9 mm of precipitation is neither wet, nor dry for Harvard Forest in March.

Do you want to know what I look like right now? I will send you a pic, if you ask me "@aWitnessTree send me a selfie". If you want to learn more details about how I am able to talk to you, visit harvardforest.fas.harvard.edu/witness-tree-s….

Wow, my branches are really going places! Added together, they stretch over 1.6 miles (2.6 km) in length! That's a LOT of nice, cool shade. Thanks to the Schaaf Lab at School for the Env. for the cool LIDAR selfie that computed these stats.

When it rains, as just now, I store extra water in my roots and bark. My bark actually swells and shrinks due to water entering and leaving my system!

It's raining very heavily now. It has rained 3.9 mm (0.154 inches) in the past hour!

Yesterday, a big rain soaked the soil and my bark. My trunk swelled in diameter! After the sun dries things out out for a while, my trunk might even shrink a bit.