ASCL Workshop— Boulder, CO Fundamental Concepts for Essential Principal: Atmospheric circulations transport matter, energy. Breakout session: 5c & 7c Recorder:, Tamara Ledley

ASCL Workshop— Boulder, CO Initial Comments ► Q: Circulation or circulations? ► Q: Transport momentum or transfer momentum? ► Q: Where are forces covered? ► Q: EP1: Structure and composition of atmosphere should be in EP1? Should include aerosols, basic chemical structure, and ionosphere (including upper atmosphere) ► Q: EP2: Should include sun variability and other forces (IR heating (indirect solar response), Coriolis force, etc) which gives rise to the circulation. ► Q: EP 4: The atmosphere changes over time and space giving rise to weather, climate, and space weather. (reword) ► Point: These fundamental concepts link to other essential principles and should reinforce the system approach.

ASCL Workshop— Boulder, CO Fundamental Concept #1 ► Patterns of motion/circulation can be observed at different scales from the global to local. Temperature differences and the spin of the earth establish this circulation.

ASCL Workshop— Boulder, CO Fundamental Concept #2 ► The atmosphere transports water that impact the formation and development of precipitation and weather systems. It is an important component of the global water cycle.

ASCL Workshop— Boulder, CO Fundamental Concept #9 ► Atmosphere is an important component of the global carbon cycle. Through photosynthesis, plants acquire their mass from carbon dioxide. Human activities like burning fossil fuels, natural process such as decay release carbon into the atmosphere. ► This needs to include the biological exchanges with the atmosphere in the context of the carbon cycle

ASCL Workshop— Boulder, CO Fundamental Concept #3 ► Atmosphere transport produces episodic events such as cyclones, hurricanes, tornados, air quality and other extreme weather and climate events. ► This needs to be hashed out more…needs more work.

ASCL Workshop— Boulder, CO Fundamental Concept #4 ► Circulation(s) distribute energy, water, gases, particles, globally establishing climate, weather, and upper atmosphere patterns that can be beneficial or detrimental to the health of the planet and the health of individuals (air quality, pollution, droughts, floods, wildfire, severe storms, stratospheric ozone, satellite, and communication systems, power grids). ► FC 3, 4, 5 seem to have substancial overlap. These need to be condensed and rewritten.

ASCL Workshop— Boulder, CO Fundamental Concept #5 ► Energy exchanges occur at the atmospheric boundaries which in turn have an interface with the ocean, land, space, and sun. These energy exchanges drive circulation(s). (Latent heating, conduction, convection, sensible heat, radiation, albedo, density differences, absorption, particle heating).

ASCL Workshop— Boulder, CO Fundamental Concept #6 ► Matter and energy exchanges occurs interfaces between the atmosphere and the other Earth systems (such as nitrogen, sulphur, and phosphorus cycles). ► The re-examination of 3, 4, and 5 and #2 should be consistent with this one

ASCL Workshop— Boulder, CO Fundamental Concept #7 and #8 ► Technology enables us to observe, model, and predict circulation transports in the atmosphere (EP 6) ► Human activities contribute to change in atmospheric circulation patterns (EP 7) ► Accept these suggestions to move

ASCL Workshop— Boulder, CO Concluding Remarks ► What are the properties of a system? ► Concern that we are not addressing system issues and that this process is reinforcing existing paradigms.