Tree struck by lightning caused the bark to explode, effectively stripping the tree
nothing gets me hotter than a good old strip treese
I WOULD LITERALLY DIE IF A BB SEAL CAME SCOOTING UP TO ME
Filler post until I get back from the lake with my parents.
Weird gravity waves pulse from a tropical cyclone
Last Monday, May 13, the Suomi NPP satellite captured a fascinating image of Tropical Cyclone Mahasen as it moved northeast over the Bay of Bengal. The clouds of the storm itself weren’t optically visible in the darkness of a nearly new Moon, but lightning flashes within it were… as well as the eerie ripples of atmospheric gravity waves spreading outwards from its center.
Gravity waves are the oscillations of air parcels by the lifting force of bouyancy and the restoring force of gravity. These waves propagate vertically as well as horizontally, and actively transport energy and momentum from the troposphere to the middle and upper atmosphere. Gravity waves are caused by a variety of sources, including the passage of wind across terrestrial landforms, interaction at the velocity shear of the polar jet stream and radiation incident from space. They are found to affect atmospheric tides in the middle atmosphere and terrestrial weather in the lower atmosphere.
Atmospheric gravity waves aren’t to be confused with gravitational waves in space, which are created by very dense, massive objects (like white dwarf stars or black holes) orbiting each other closely.
When the image was captured, Tropical Cyclone Mahasen was moving north through the Indian Ocean along a track that placed landfall along the Bangladesh coast. As it moved off the coast of India Suomi’s VIIRS Day-Night Band was able to resolve lightning flashes towards the center of the storm, along with mesopheric gravity waves emanating outwards like ripples in a pond.
Such gravity waves are of particular interest to air traffic controllers so assist in identifying areas of turbulence.
Image credit: NASA/NOAA
reblogging for Zal, as it is relevant to our currently ongoing conversation about weather sciences
This is extremely scary and hilarious all at the same time.
woah woah woah wait a sec…maybe I’m getting you mixed up with someone else but aren’t you graduating this year?
omg no the only thing i graduated was the 10th grade but you might be thinking that my cousin is graduating because he is and i’m going to nashville for the party yee
AH Yes, I must have gotten mixed up - my sister and a few other online friends I’ve made recently all graduate this year, I must have made assumptions and lumped you in with them!