# Comparing Sentinel-2 and Landsat 8 for Burn Severity Mapping in Western North America
## 2 Materials and Methods
### Study Region and Field Data
\begin{table}
\begin{tabular}{l l l l l l l l} \hline
**Map** & **Fire** & **Year** & **Fire Size** & **Elevation** & **CBI** & **Data** & **Overstory Species** \\
**ID** & **Fire** & **(ha)** & **(m)** & **Plots** & **Source \({}^{*}\)** & **(in Order of Prevalence)** \\ \hline
1 & Hayes Two & 2016 & 1081 & 988–1903 & 31 & 3 & ABAM, ABIA, TSHE, PSME, TSME \\
2 & Norse Peak & 2017 & 20,590 & 830–2099 & 35 & 1 & ABAM, PSME, TSME, TSHE, PIEN \\
3 & Rock Creek & 2016 & 552 & 983–1359 & 11 & 1 & PSME, ABGR, PIPO \\
4 & Jolly Mountain & 2017 & 15,399 & 693–1929 & 12 & 1 & PSME, ABGR, TSHE, PIPO, THPL \\
5 & Jones & 2017 & 4144 & 328–1147 & 27 & 1 & PSME, TSHE, THPL \\
6 & Rebel & 2017 & 3653 & 570–1633 & 8 & 1 & PSME, TSHE, THPL, ABGR \\
7 & Mill 0843 CS & 2017 & 9722 & 1092–2200 & 65 & 1 & PIPO, TSME, ABAM, PICO, ABGR \\
8 & Rail & 2016 & 17,693 & 1325–2370 & 23 & 1 & PICO, ABGR, PSME, PIPO, LAOC, ABCO \\
9 & Pioneer & 2016 & 76,572 & 1002–2649 & 12 & 1 & PSME, PICO, ABLA, PIPO, PIEN \\
10 & Kenow & 2017 & 20,058 & 1263–2409 & 147 & 5 & ABLA, PIEN, PSME \\
11 & Lolo Peak & 2017 & 25,152 & 1010–2779 & 21 & 1 & PSME, ABLA, PICO, LAOC, PIEN, PIPO \\
12 & Liberty & 2017 & 11,191 & 1339–2330 & 9 & 1 & ABLA, PICO, PSME, PIEN, LAOC \\
13 & Rice Ridge & 2017 & 69,202 & 1266–2652 & 27 & 1 & PSME, ABLA, PIEN, PICO, LAOC, PIAL \\
14 & Meyers & 2017 & 27,738 & 1664–2921 & 23 & 1 & PICO, ABLA, PIEN, PIAL, PSME \\
15 & Maple & 2016 & 20,835 & 2003–2666 & 36 & 1, 3 & PICO, PSME, ABLA, PIEN \\
16 & Berry & 2016 & 8944 & 2061–2797 & 27 & 1 & PICO, ABLA, PIEN \\
17 & Legion Lake & 2017 & 22,162 & 1022–1719 & 32 & 2 & PIPO \\
18 & Bald Mountain & 2018 & 8496 & 1694–3229 & 17 & 4 & PSME, POTR, ABLA, ABCO \\
19 & Mammoth & 2019 & 270 & 2757–3129 & 25 & 6 & PINE, ABLA, PSME, POTR \\
20 & Trail Mountain & 2018 & 7416 & 2121–3233 & 38 & 4 & PSME, POTR, ABLA, PIEN \\
21 & Skull Flat & 2019 & 674 & 2272–3031 & 31 & 6 & ABCO, PSME, ABLA, POTR \\
22 & Skull Flat 2 & 2019 & 1022 & 2313–3030 & 30 & 6 & ABLA, POTR, ABCO, PSME \\
23 & Brainhead & 2017 & 30,042 & 2169–3371 & 72 & 4 & ABLA, POTR, PIEN, PIPO \\
24 & Little Bear & 2019 & 1078 & 2395–2828 & 47 & 6 & PIPO, ABCO, PIEL, PSME \\
25 & Chippean & 2019 & 91 & 2323–2405 & 33 & 6 & PIPO, PSME, PIED, JUOS \\
26 & Fuller & 2016 & 6180 & 1314–2761 & 73 & 2 & PIPO, ABCO, PIED, JUOS, POTR \\ \hline \end{tabular}  
* Composite burn index (CBI) data sources: (1) [PERSON] and [PERSON], University of Washington [22]; (2) [PERSON], USGS [56]; (3) US National Park Service; (4) [PERSON], Utah State University; (5) Parks Canada; (6) [PERSON], Utah State University, Utah Forest Institute.  
\end{table} 
Table 1: Fires analyzed in this study. Overstory species within each fire were estimated from the basal area product of the USDA National Individual Tree Species Atlas [55], which is available within the US. For the Kenow fire, which was located immediately north of the US-Canadian border, we delineated a false perimeter just south of the border in similar terrain in order to extract estimates of overstory species prevalence to maintain dataset consistency. Tree species abbreviations: _Abias amabilis_ (ABAM) Pacific silver fir; _Abies concolor_ (ABCO) white fir; _Abies grandis_ (ABGR) grandis_ fir; _Abies lasiocarp_ (ABLA) subalpine fir; _Juniperus osteosarcoma_ (UOS) Utah juniper; _Larix occidentalis_ (LAOC) western larch; _Pica engelmannii_ (PIEN) Engelmann spruce; _Pinus albiculails_ (PIAL) whitebank pine; _Pinus contorta_ (PICO) lodgepole pine; _Pinus edulis_ (PIED) two-needle piflon pine; _Pinus flexilis_ (PIFL) limber pine; _Pinus ponderosa_ (PIPO) ponderosa pine; _Populus tremuloides_ (POTR) quaking aspen; _Pseudostosa menziesi_ (PSME) Douglas-fir; _Thuja placata_ (THPL) western redcedar; _Tsuga heterophyllla_ (TSHE) western hemlock; and _Tsuga metretisana_ (TSME) mountain hemlock. height prior to burning.