Sap Velocity Data for Urban Trees in Chicago, Illinois (2024-2025)

Dataset · Thu Jan 01 00:00:00 EST 2026

DOI:https://doi.org/10.15485/3013822· OSTI ID:3013822

Berkelhammer, Max ^[1]; Kaludi, Bilal ^[1]; Lee, Jangho ^[1]; Negri, Cristina ^[2]; Collis, Scott ^[2]; Muradyan, Paytsar ^[2]; O'Brien, Joseph ^[2]; Grover, Maxwell ^[2]; Tuftedal, Matthew ^[2]; Gonzalez-Meler, Miquel ^[1]; Cho, Ahram ^[1]; Rios Bolivar, Fabiola ^[1]; Romero, Whitney ^[1]; Dietzen, Sarah ^[1]; Vincent, Anna ^[3]; Miller, William ^[3]; Packman, Aaron ^[3]; Gala, Tekleab ^[4]; McNicol, Gavin ^[1]

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1. University of Illinois Chicago
2. Argonne National Laboratory
3. Northwestern University
4. Chicago State University

This dataset contains uncorrected sap velocity measurements using the heat ratio method (HRM) collected using ICT International SFM1x sensors at five urban sites in Chicago, Illinois, as part of the DOE CROCUS project. The data includes continuous monitoring of sap velocity from various tree species, including Maples (Acer spp.): Sugar Maple (Acer saccharum), Silver Maple (Acer saccharinum), and Red Maple (Acer rubrum); Oaks (Quercus spp.): Swamp White Oak (Quercus bicolor); American Elm (Ulmus americana); Honey Locust (Gleditsia triacanthos); Cottonwood (Populus deltoides); and Tree of Heaven (Ailanthus altissima) across Chicago State University (CSU), Northeastern Illinois University (NEIU), Northwestern University (NU), University of Illinois Chicago (UIC), and West Woodlawn "Blacks in Green" (BIG). These include both street trees and those in urban park locations. Measurements were collected at 15-20 minute intervals, depending on the sensor, and transmitted via Long Range Wide Area Network (LoRaWAN) protocols. The wireless data was collected by Sage Network (https://sagecontinuum.org/) nodes. The dataset includes sensor ID, Global Positioning System (GPS) coordinates, tree species (common and scientific names), tree identification number, diameter at breast height (DBH in cm), uncorrected sap velocity measurements (cm/hr) from both inner and outer probes, and Sage Node identifiers so the data can be mapped to related variables such as air quality and wind speed that were collected on the Sage nodes. All timestamps are in local Chicago time (CDT/CST). Quality control flags are provided using a 3-bit binary system indicating physical range violations (< -10 or > 60 cm/hr), step spikes (absolute difference > 36 cm/hr), and stuck sensor conditions (> 10 consecutive identical values). These are raw data, not corrected for wood anatomy or species-specific characteristics. Data is provided in comma separated (CSV) format. This dataset is part of a larger collection of CROCUS environmental monitoring data, including linked datasets from Air Quality Transmitter (AQT) sensors, Weather Transmitter (WXT) sensors, and Multi-Function Research LoRaWAN (MFR) Nodes. DOIs for the supporting data are provided as part of this data package.

• Research Organization: Community Research on Climate and Urban Science Urban Integrated Field Laboratory (CROCUS UIFL)
• Sponsoring Organization: ESS-DIVE; U.S. DOE > Office of Science > Biological and Environmental Research (BER)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 3013822
• Country of Publication: United States
• Language: English

Related Subjects

Chicago
CROCUS
Ecohydrology
Ecosystem services
Environmental monitoring
Heat ratio method
Sap velocity
Transpiration
Tree physiology
Urban ecology
Urban Integrated Field Lab
Urban trees