Chapman Conference on
Atmospheric Absorption of Solar Radiation
Estes Park, Colorado

August 13-17, 2001

Program Committee
Scientific Program New
Online Registration Form
Hotel and Colorado Information Revised
Getting to Estes Park
Additional Information


Program Committee

The purpose of the conference is to advance the understanding of atmospheric absorption with an aim of reconciling a discrepancy between models and observations. Specific objectives include:

1. A critical evaluation of basic radiative properties of the constituents of the atmosphere and surface, instrument technology, and observation methods that may have a bearing on the discrepancy; and

2. Advance hypotheses concerning the discrepancy, propose tests to resolve issues that are raised, and identify new approaches and areas that need to be investigated.


  1. Radiation Budgets of the Surface and Atmosphere
    a. clear skies and the effects of clouds
    b. broadband fluxes
    c. spectral features
  2. Optical Properties of the Atmosphere and Surface
    a. gases
    b. aerosols
    c. clouds
    d. surface
  3. Observational Methodology
    a. calibration and instrumental artifacts
    b. spectral/broadband consistency
    c. sampling problems
  4. Mechanisms for Anomalous Absorption

Abstract Submission Information

Abstract Deadline: May 10, 2001

ABSTRACT SUBMISSIONS BY E-MAIL: Compose your abstract on your E-mail software exactly as you would a normal message, using a MAXIMUM of 75 standard ASCII characters per line. Re-set your margins, if necessary, so that the text wraps from line to line, to avoid the insertion of hard returns. Follow the instructions below. A sample E-MAIL abstract is provided at the end.

I) TITLE - The title of the abstract should be composed in a standard title format, capitalizing the first letter of all words of four or more letters. Insert one blank line after title.

II) AUTHOR BLOCK- The author block should contain the name of a presenting author that should be enclosed in brackets and asterisks, like so: [*I M First*]. If there is no presenting author, then input [*---*] at the beginning of the author block. Input your author block by typing the author's name, then putting their address, phone, fax, and e-mail information in parentheses, ( ). Do not put each author on a separate line, but rather, separate each author's information with a semi-colon (;). Leave one blank line after the author block.

III) ABSTRACT TEXT - Special symbols or graphics should not be used in composing the abstract. Leave one blank line between paragraphs and after the body.

IV) SUBMITTAL INFORMATION - This section is to record information about which meeting the abstract is being submitted to and to obtain contact information. Please provide the following:
1. Title of meeting (Chapman Conference on Atmospheric Absorption of Solar Radiation) (VERY IMPORTANT!)
3a. Corresponding address: Give name, affiliation, and mailing address of the author to whom all correspondence regarding this abstract should be sent.
3b. Corresponding author's telephone number.
3c. Corresponding author's fax number 3d. Corresponding author's E-mail address.
4. Indicate whether the first author is a student.

V) SUBMIT YOUR ABSTRACT - Send the abstract to the following Internet address:

VI) CONFIRMATIONS - Confirmations of received abstracts will be sent via electronic mail within one business day of submission. If you have not received confirmation, please call the AGU at +1-202-777-7332 or fax: +1-202-328-0566, or e-mail:

Remote Sensing of Alpine Snow Properties: A Review of Techniques and Accomplishments Using the Visible Wavelengths Through the Microwave

[*J S Smith*] (Department of Geology, University of California, Santa Barbara, CA 93106-3060; ph. 805-893-2308; fax 805-893-2578; e-mail:; A C Cohen (Hydrology Department, Watertown University, Watertown, MA 02172; ph. 413-789-1234; fax 413-789-1256; e-mail:

Topography causes wide variations in the properties of alpine snow within small areas, and a knowledge of the spatial variation of many properties is essential for the application of distributed hydrologic models and for establishing the surface boundary condition for regional climate models. However, the topography affects the electromagnetic remote sensing signal by shadowing some terrain and by modifying the angles of incidence, emission, and reflection of the signal, and our knowledge of the elevation model is usually not precise enough to allow a priori calculation of the geometric relationships between the surface, sensor, and the Sun. Hence remote sensing algorithms must be robust to such uncertainties, except in areas where topographic knowledge is especially good. The most elementary snow property is the presence or absence of a snow cover, and snow mapping -- discrimination of snow from other types of surfaces and from clouds -- is best accomplished with a combination of visible and near-infrared wavelengths.

1. Chapman Conference on Atmospheric Absorption of Solar Radiation
2. Invited
3. (a) J S Smith Department of Geology University of California Santa Barbara, CA 93106-3060 (b) 805-893-2309 (c) 805-893-2578 (d)
4. No

If you have questions, please contact Ann Singer at: E-mail:; Phone: +1-202-777-7340

Travel Funds: Application Deadline is May 10, 2001
Applications are being made to several U.S. agencies to support travel for a limited number of conference participants. Graduate students and young scientists will receive priority for funding.

To apply for travel funds, please print and complete the Chapman Conference Travel Grant Application(no longer available), and return it to the AGU Meetings Department by May 10, 2001.

Hotel and Colorado Information

Hotel Accommodations Deadline: Extended until July 6, 2001

Sleeping rooms have been reserved under "American Geophysical Union" at the Rocky Mountain Park Holiday Inn, at the special AGU rate of $129 single or double occupancy, plus taxes. To reserve a room, call 1-800-803-7837 or 1-970-586-2332. For more facility information, refer to

The hotel requires the first night’s deposit to secure each reservation. Deposits can be made with major credit cards or personal checks. Credit cards will be charged upon arrival. Reservations which are cancelled prior to 72 hours of the arrival will receive a refund of the deposit.

Check-in time is after 3:00 p.m. and check out is by 11:00 a.m.

Getting to Estes Park

Airline Discounts

United Airlines is offering 5% off airfares to Denver (DEN). Save an extra 5% if you book your ticket at least 60 days prior to departure. To obtain these fares you (or your travel agent) must call 1-800-521-4041 and refer to Meeting ID Number #549TP. Reservation clerks are available daily 7:00 A.M.-12:00 midnight, Eastern Daylight Time.

Ground Transportation

Shuttle Bus: Door-to-door shuttle bus service is available from the Denver International Airport to the Rocky Mountain Park Holiday Inn. This is a 2-hour trip.

It is recommended that you reserve shuttle service as soon as your flight itinerary is finalized as service is limited and sells out quickly.

     Emerald Shuttle: Departs from Door 511 on the East side of the Baggage Claim area. Shuttle departs Denver at 9am, 12pm, 3pm, and 6pm. Return service from Estes Park is provided daily at 6am, 9am, 12pm, and 3pm. The cost is $35 per person one-way, or $70 round-trip. Reservations are required at least 48 hours in advance. Call 970-586-1991. A Visa or MasterCard is required.

     Estes Park Shuttle: Shuttle departs Denver at 9am, 12pm, 3pm, and 6pm. Return service from Estes Park is provided daily at 6am, 9am, 12pm, and 4pm. The cost is $39 per person one-way, or $75 round-trip. Reservations are required at least 72 hours in advance. Call 970-586-5151.

     Car: You may want to consider driving to Estes Park. Discount rental car rates are being explored and will be posted on this site soon. The Rocky Mountain Park Holiday Inn is located at the junction of US 36 and Colorado Hwy. 7. From Denver, take Highway 36 to Estes Park (70 miles northwest from Denver International Airport). See map.

Helpful Colorado Websites:

Additional Information
Additional information and program information as the conference topics are developed will be available on the AGU Website -