Freezing point from salinity

Code snippets

curl "https://api.oanor.com/seawater-api/v1/freezing-point" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/seawater-api/v1/freezing-point", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/seawater-api/v1/freezing-point");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/seawater-api/v1/freezing-point",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "note": "The freezing point of seawater (Millero) drops with salinity — about −1.9 °C at the ocean's typical 35 ppt, versus 0 °C for fresh water. Because salt also lowers the temperature of maximum density below the freezing point, seawater keeps overturning and cooling all the way to freezing instead of stratifying like a freshwater lake — which is why the open ocean rarely freezes except in the polar seas, and the ice that forms is nearly salt-free.",
        "inputs": {
            "salinity_ppt": 35
        },
        "freezing_point_c": -1.9223
    },
    "meta": {
        "timestamp": "2026-06-07T08:18:07.843Z",
        "request_id": "86601428-d9c5-4131-827b-c158431da979"
    },
    "status": "ok",
    "message": "Freezing point",
    "success": true
}