GEO 391
GLOBAL
LAND
ATMOSPHERE
INTERACTION
DYNAMICS (GLAD)
(Tuesday 4:00-7:00)
Fall 2019
Goals:
To provide an introduction to the role of land in weather and climate systems,
and to transition the students from learning a course to doing a research
project.
Topics: Basics of terrestrial surface energy, water and carbon balances. Micrometeorology and atmospheric boundary layer. Ecohydrology, biometeorology, hydrometeorology, and hydroclimatology. Theory, modeling, and observations. Spatial scales: point scale (meters) to global. Temporal scales: seconds to centuries.
At
the end of the semester, the students are expected to be knowledgeable about the
frontier research topics facing the scientific community and society, such as
the global water/energy/carbon cycles, the relative contributions to climate
change due to increases in greenhouse gases and changes in land use/land cover,
the impacts of urbanization and deforestation on the atmosphere and climate, and
the impacts of climate change on water resources, ecosystems, and the
environment. Although the students are not required to run state-of-the-art land
surface models, they will need to know how these models can be used to answer science
questions, they will learn how to design numerical experiments, interpret
results from (say) the NCAR
Community Land
Model (Diagnostics),
understand the sources of observations (e.g., flux tower measurements and
satellite remote sensing), write scientific reports, and make scientific presentations.
Instructor: Dr. Zong-Liang Yang, Tel: 512-471-3824, Email: liang@jsg.utexas.edu
Lectures:
Tentative Schedules (to be refined during the course of the semester)
Week | 4:00-4:50 pm | 5:00-5:50 pm | 6:00-6:50 pm | Topics |
1 (First class on September 3, 2019) | Introduction (instructor, students, syllabus, textbooks, references) | The Earth system, why land, land-atmosphere interaction, computer modeling of weather and climate | History of Land Surface Studies |
Bonan (concepts): Ch. 1-3 (pp. 1-57): Intro., components of the Earth system, and global energy, hydrologic, and biogeochemical cycles; Ch 25 (earth system models); Ch 31 (aerosols, chemistry, climate) Bonan (modeling): Ch. 1, terrestrial biosphere modeling, Ch. 20.2, BVOC |
2 (Sept 10, 2019) | Atmospheric radiation and general circulation | Climate | Climate variability |
Bonan (concepts), Ch. 4-8 (Ch. 5 Atmospheric
general circulation and climate; Ch. 6, Earth's
climate; Ch. 7 Climate variability) (Shuttleworth: Ch. 9 Global scale influences on hydrometeorology) |
3 (Sept 17, 2019) | Mini review of topics covered to date; Climate Change | Climate change; Soil physics | Soil temperature and soil moisture modeling |
Bonan (Concepts): Ch. 8, Climate change; Ch. 9,
Soil physics:
soil classifications and soil temperatures Bonan (Modeling): Ch. 5, Soil temperature; Ch. 8, soil moisture (Shuttleworth: Ch. 4, 6, 7 Surface energy fluxes) Problem Set #1 Due September 24 (see Assignments.htm) |
4 (Sept 24, 2019) | Soil map; 10-L Soil Model | Soil biogeochemistry | Soil biogeochemistry modeling |
Bonan (Concepts): Ch. 14, Soil moisture and the
atmospheric boundary layer; Ch. 21: Soil
biogeochemistry;
Soil Physics Multi-State Research Project Bonan (Modeling): Ch. 18, Soil biogeochemistry (Shuttleworth: Ch. 24 SVATs) |
5 (Oct 1, 2019) | Turbulence, Turbulent fluxes; Thermodynamics | Atmospheric Stability | Atmospheric Boundary Layer and Turbulence | Bonan (Concepts), Ch. 13, 14, 15; ABL and surface energy balance |
6 (Oct 8, 2019) | Independent Study | Bonan (Concepts): Ch. 18: plant canopy,
big leaf models,
z0,
d, LAI; LAI
measurements (in
situ method,
satellite remote sensing) Shuttleworth: Ch. 21, 22 Whole canopy interactions |
||
7 | Quiz #3; hydrology | Bonan (Concepts): Ch. 11, 12: water
balance, watershed hydrology, and river routing Shuttleworth: Ch. 1, 12, 13, 14, 23 The global water cycle, precipitation, evaporation; Problem Set #2 Due October 12 (see Assignments.htm) |
||
8 | "Impacts of soil classification on hydrology" Guest lecture by Dr. Hui Zheng | "Soil moisture retrieval using data assimilation and land modeling" Guest lecture by Dr. Long Zhao | "Soil moisture variability and drought monitoring" Guest lecture by Dr. Ying Sun | |
9 | Quiz #4 | |||
10 | Introduction to the Global Carbon Cycle: Guest Lecture by Professor Robert Dickinson | Modeling the Carbon Cycle: Guest Lecture by Dr. Ying Sun | Bonan (Concepts): Ch. 16, 17, 18; Leaf
energy fluxes and leaf photosynthesis (The
classic
Farquhar model; New applications:
Bonan
1995,
Bonan
et al. 2011,
Chen
et al. 2011); Shuttleworth: Ch. 21 Canopy processes and canopy resistances Bonan (Concepts): Ch. 19-24: ecosystems, vegetation dynamics, global biogeography; Ch. 29: Carbon cycle-climate fedbacks Shuttleworth: Ch. 24: Soil Vegetation Atmosphere Transfer Schemes Sun, Y., L. Gu, R.E. Dickinson, R. J. Norby, S. G. Pallardy, and F. M. Hoffman, 2014: Impact of mesophyll diffusion on estimated global land CO2 fertilization, PNAS. |
|
11 | (Term Paper Topic Due) Biomes, PFTs, and DGVMs | LSMs | Quiz #5 | Bonan (Concepts): Ch. 25, 27, 28, 29:
Land-climate interactions Shuttleworth: Ch. 25: Sensitivity to land surface exchanges |
12 | Land (Snow) Data Assimilation -- Guest lecture by Yongfei Zhang (paper) | The Dust Cycle -- Guest lecture by Sagar Parajuli (paper) | The water balance over the Mississippi River Basin and the CONUS -- Guest lecture by Xitian Cai (paper) | Numerical modeling applications with the NCAR CLM |
13 | Subgrid scale variability of land surface features; scaling up and down (zooming in and out) | Urbanization; CLMU | Accomplishments, Challenges, and Opportunities | Bonan (Concepts): Ch. 27, 30: Land use
and land cover change, urbanization Shuttleworth: Ch. 25C: The influence of imposed persistent changes in land cover |
14 | Quiz #6 | Modeling discussions:
Bonan, G. B., and
S. Levis (2010), Quantifying carbon-nitrogen
feedbacks in the Community Land Model (CLM4),
Geophys. Res. Lett.,
37, L07401,
doi:10.1029/2010GL042430. Lawrence, D.M., K.W. Oleson, M.G. Flanner, P.E. Thornton, S.C. Swenson, P.J. Lawrence, X. Zeng, Z.-L. Yang, S. Levis, K. Sakaguchi, G.B. Bonan, and A. G. Slater, 2011: Parameterization improvements and functional and structural advances in version 4 of the Community Land Model, Journal of Advances in Modeling Earth Systems, [pdf] |
||
15 | (Term Paper Due) Presentations | Presentations; course evaluations | (Last class) | Presentations |
Office Hours:
Friday, 3:00-5:00 pm or by appointment, JGB Room 5.220DA
Required Textbook:
Ecological Climatology:
Concepts and Applications (Gordon Bonan, 2016, ThirdEdition,
Cambridge University Press, pp. 692)
Assignments: click here
Prerequisite:
Basic calculus and physics (M308M and PHY 303K or equivalent courses) and an
interest in interdisciplinary processes.
Grading Policy:
Generally, homework will be
due one week from the date when it is given; if it is given on Monday, it will
be due next Monday in the beginning of the class. Late homework will not be
accepted without a pretty good reason. You are encouraged to work together on
your homework if you wish, but make sure you understand what you write down.
Pop-quizzes will be given at
random times without prior notice, about every 2 weeks. In these you will
be given a question related to the subject matter and/or assigned reading
materials to write about or a problem to solve, and about 5 minutes to do
it. Please bring loose-leaf paper, a pencil, and a scientific calculator to
every class.
There will be no mid-term test
and final examination. Participation in class discussions, and raising good
questions during lecture are strongly encouraged. Grades will be determined from
the following formula:
Homework/Participation and Basic Programming | 30% |
Bi-weekly 5-minute quiz | 30% |
Topic for term paper (Due November 3, 2014) [see Elements of Style and A Guide to Write a Paper by G.H. Jirka (1992)] | 20% |
Presentation (Term paper due December 1, 2014) | 20% |
Graduate
students need to read and comment on cutting-edge research articles in the
literature. In addition, graduate students are expected to demonstrate more
skills in quantitative analysis and numerical modeling.
Final Letter Grades: The percent-letter grade relationship will usually be:
>90 A, 80-89 B, 70-79 C, 60-69 D, and < 60 Ouch.
Your attendance and extra credits will affect your final grades.
UT's Classroom Safety Procedure:
As we ready for the start of the semester, please read
information on emergency evacuations and resources provided by Dr. Robert
Harkins, the Associate Vice President for Campus Safety and Security. The t
Major References:
Global Physical Climatology, D. L. Hartmann, 1994
The Atmospheric Boundary Layer,
J. R. Garratt, QC 880.4 B65 G37 1992.
Handbook of Hydrology,
D. R. Maidment, GB 662.5 M35 1993.
Land Surface Evaporation: Measurement and Parameterization, T. J. Schmugge and J.-C. Andre, QC 915.6 L36 1991.
An Introduction to Atmospheric Radiation, 2nd edition, K.N. Liou, 2002
A Climate Modeling Primer, 2nd edition, K. McGuffie and A. Henderson-Sellers, 1997
Climate System Modeling,
K. E. Trenberth, QC 981 C65 1992.
Mesoscale Meteorological Modeling, Second Edition, R. A. Pielke, Sr., Academic
Press, 2002.