DOI: 10.5061/dryad.tmpg4f5bp
title: Climate data collected during sonar estimation of summer chum and pink salmon in the Anvik River, Alaska, 2024

description: Dual-frequency identification sonar (DIDSON) was used to estimate adult
 summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage
 in the Anvik River from June 16 to July 26, 2024. Apportionment to species
 was determined using data collected from tower counts. A total of 135,164
 (SE 5,726) summer chum salmon and 126,732 (SE 3,032) pink salmon were
 observed to have passed the sonar site. A high-water event necessitated
 removing the sonars from the water on July 14. The right bank sonar was
 redeployed on July 19 and the left bank on July 20. The range of
 ensonification was considered adequate for most fish that migrated
 upstream. A beach seine fishery was conducted to collect age, sex, and
 length information. Because of high water, the fishery was discontinued
 after July 9. Climate date was collected daily at 1800 and water
 temperature data was collected hourly.
description: Climatic and hydrologic data were collected at approximately 1800
 each day at the sonar site. River depth was monitored using a staff gauge
 marked in 1 cm increments. Change in water depth was presented as negative
 or positive increments from the initial reading of 0 cm. Air temperature
 and subjective notes about wind speed and direction, cloud cover, and
 precipitation were also recorded. Water temperature was measured using a
 HOBO data logger, which electronically recorded the temperature every
 hour, on the hour, for the duration of the project.
description: # Climate data collected during sonar estimation of summer chum and pink
 salmon in the Anvik River, Alaska, 2024 Dataset DOI:
 [10.5061/dryad.tmpg4f5bp](10.5061/dryad.tmpg4f5bp) ## Description of the
 data and file structure These data were collected while investigating
 adult summer chum salmon (Oncorhynchus keta) and pink salmon (O.
 gorbuscha) passage in the Anvik River, Alaska. ### Files and variables
 #### File: 2024_Anvik_River_Climate_Observations.csv
 **Description:** Climatic observations recorded daily at 1800 at the Anvik
 River sonar project site, 2024. ##### Variables * Date: The date of
 observation in M/D/YYYY format. * Precipitation: (code a: Precipitation
 code for the preceding 24-hour period: A = none; B = intermittent rain; C
 = continuous rain; D = snow and rain mixed; E = light snowfall; F =
 continuous snowfall; G = thunderstorm with or without precipitation.) *
 Wind Direction: (code b: Wind direction code: N = North; S = South; E =
 East; W = West; V = Variable; NA = Not applicable (no wind).) * Wind
 Velocity (kph) * Sky (code c: Instantaneous cloud cover code: C = clear,
 cloud cover &lt; 10% of sky; S = cloud cover &lt; 60% of sky; B = cloud
 cover 60–90% of sky; O = overcast (100%); F = fog, thick haze, or smoke.)
 * Air temperature (degrees C) Missing Data: ND indicates no data recorded
 #### File: 2024_Anvik_River_Water_Temperature.csv **Description:** Daily
 water temperatures on the left bank at the Anvik River sonar project,
 2024. ##### Variables * Date (M/D/YYYY) * Minimum (degrees C) * Maximum
 (degrees C) Missing Data: ND indicates no data recorded