Every arrow on the El Niño map answers to a paper trail, and here is the wall of it: 17 articles, quoted and dated, each pinned to the exact claim it backs. Scan the photos, flip to the spreadsheet, then go argue with the map.
How this wall is built. Citations are extracted while the map ingests its feeds, then resolved to their original articles, photos and all, on a daily pass. Trust tiers reflect the source weighting the map itself uses when it scores an edge.