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In-situ calibration/validation measurements of remote sensing reflectance for the Arctic (149137)
Proposal Status: Conformity Determination Issued
Project Overview
Type of application: New
Proponent name: Anders Knudby
Company: University of Ottawa
Start Date: 2019-08-25
End Date: 2019-08-31
Operation Type: Annual
Project Description:
Ocean colour remote sensing relies on a precise estimate of the remote sensing reflectance (Rrs), calculated as the water-leaving radiance divided by the incoming irradiance. Rrs estimates can be used to derive concentrations of water constituents, and to map bathymetry and benthic habitat in shallow water. However, estimating Rrs from the signal measured at the sensor requires accounting for contributions arising from scattering in the atmosphere and at the sea surface, as well as absorption in the atmosphere, a process also known as atmospheric correction. Current atmospheric correction models are based on field measurements taken between 17.6 ºS and 38.9 ºN, and are therefore not appropriate for the Arctic. While ocean colour products are continuously produced for the Arctic, and indeed used to assess important changes to the ocean environment, the fundamental radiometric products such studies are based upon are of unknown quality. The objective of the proposed research is to acquire high-quality Rrs field observations from the Canadian Arctic, and use them to: 1) validate existing Rrs products for the Arctic, and 2) develop aerosol models appropriate for the Arctic atmosphere. The methodology we propose is simple - we will deploy an Rrs-measurement system developed at the University of Massachusetts, which combines two radiometers and accessory instruments (e.g. an IMU for tilt detection), to measure Rrs. The system will be pulled after a small boat, continuously logging, within windows of +/- 1 hour of ocean colour satellite overpasses. The Rrs measurements themselves will be compared to existing satellite-derived Rrs products to assess the validity of those products and any biases they have, and the measurement of downwelling radiation will be used to develop an Arctic aerosol model.
Persons: 2
Days: 6
Project Map
List of all project geometries:
ID Geometry Location Name
5222 polygon Cambridge Bay
5223 polygon Dease Strait
Planning Regions:
Affected Areas and Land Types
Settlement Area
Project Land Use and Authorizations
Project Land Use
Marine-Based Activities
Licensing Agencies
No data found.
Other Licensing Requirements
No data found.
Material Use
Type Quantity Size Use
Small boat 1 4 x 1.5 m The scientific equipment (radiometers) will be on a floating platform, which will be towed after a small boat.
Fuel Use
Type Container(s) Capacity UOM Use
Gasoline 1 12 Gallons For driving the boat
Hazardous Material and Chemical Use
Type Container(s) Capacity UOM Use
No records found.
Water Consumption
Daily Amount (m3) Retrieval Method Retrieval Location
Waste and Impacts
Environmental Impacts
None - we will simply be driving the small boat around near the coast, at very low speeds, for a few hours each day, pulling the equipment after the boat. All waste (e.g. from lunch packs) will be kept on the boat and disposed of at CHARS, where we will stay.
Waste Management
Waste Type Quantity Generated Treatement Method Disposal Method
No data found.
Category: Application form attachment - Project description
Recieved: 2019-04-18
Originator: Anders Knudby
Public Registry ID: 15897
Document Size: 1556.28 Kb