# WIA-ENE-062: Glacier Preservation
## Phase 2 - API Specification

**Version:** 1.0.0
**Status:** Draft
**Last Updated:** 2025-12-25

---

## Overview

This document defines the RESTful API for accessing glacier monitoring data, submitting measurements, and retrieving preservation insights within the WIA-ENE-062 standard.

## Base URL

```
https://api.wia.org/glacier-preservation/v1
```

## Authentication

All API requests require authentication using OAuth 2.0 Bearer tokens:

```http
Authorization: Bearer {access_token}
```

### Obtaining Access Tokens

```http
POST /auth/token
Content-Type: application/json

{
  "client_id": "your_client_id",
  "client_secret": "your_client_secret",
  "grant_type": "client_credentials"
}
```

**Response:**

```json
{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "token_type": "Bearer",
  "expires_in": 3600
}
```

## Core Endpoints

### 1. Glacier Registry

#### List All Glaciers

```http
GET /glaciers
```

**Query Parameters:**

| Parameter | Type | Description | Default |
|-----------|------|-------------|---------|
| region | string | Filter by region (e.g., "Himalaya") | - |
| country | string | Filter by country code (ISO 3166-1) | - |
| size | string | Filter by size (small/medium/large) | - |
| status | string | Filter by monitoring status | active |
| limit | integer | Results per page (max 100) | 20 |
| offset | integer | Pagination offset | 0 |

**Example Request:**

```http
GET /glaciers?region=Himalaya&limit=50&offset=0
Authorization: Bearer {token}
```

**Response (200 OK):**

```json
{
  "data": [
    {
      "glacierId": "GLR-001-HIM",
      "name": "Gangotri Glacier",
      "location": {
        "region": "Himalayan Range",
        "country": "IN",
        "coordinates": {
          "latitude": 30.9229,
          "longitude": 79.0831,
          "elevation": 4200
        }
      },
      "status": "active",
      "lastMeasurement": "2025-12-20T14:30:00Z"
    }
  ],
  "pagination": {
    "total": 152,
    "limit": 50,
    "offset": 0,
    "hasMore": true
  }
}
```

#### Get Specific Glacier

```http
GET /glaciers/{glacierId}
```

**Path Parameters:**

- `glacierId`: Unique glacier identifier (e.g., GLR-001-HIM)

**Response (200 OK):**

```json
{
  "glacierId": "GLR-001-HIM",
  "name": "Gangotri Glacier",
  "location": {
    "region": "Himalayan Range",
    "country": "IN",
    "coordinates": {
      "latitude": 30.9229,
      "longitude": 79.0831,
      "elevation": 4200
    },
    "mountainRange": "Garhwal Himalaya"
  },
  "classification": {
    "type": "valley",
    "size": "large",
    "regime": "temperate"
  },
  "currentStatus": {
    "mass": 450.5,
    "area": 143.7,
    "meltRate": 2.3,
    "lastUpdated": "2025-12-20T14:30:00Z"
  }
}
```

#### Register New Glacier

```http
POST /glaciers
Content-Type: application/json
```

**Request Body:**

```json
{
  "name": "Example Glacier",
  "location": {
    "region": "Alps",
    "country": "CH",
    "coordinates": {
      "latitude": 46.5,
      "longitude": 8.0,
      "elevation": 3500
    }
  },
  "classification": {
    "type": "valley",
    "size": "medium",
    "regime": "temperate"
  }
}
```

**Response (201 Created):**

```json
{
  "glacierId": "GLR-234-ALP",
  "message": "Glacier registered successfully",
  "createdAt": "2025-12-25T10:00:00Z"
}
```

### 2. Mass Balance Measurements

#### Submit Measurement

```http
POST /glaciers/{glacierId}/measurements
Content-Type: application/json
```

**Request Body:**

```json
{
  "timestamp": "2025-12-20T14:30:00Z",
  "massBalance": {
    "totalMass": {
      "value": 450.5,
      "unit": "Gt",
      "uncertainty": 5.2
    },
    "surfaceArea": {
      "value": 143.7,
      "unit": "km²",
      "uncertainty": 2.1
    },
    "volume": {
      "value": 28.5,
      "unit": "km³",
      "uncertainty": 1.5
    }
  },
  "methodology": {
    "technique": "satellite_altimetry",
    "instrument": "ICESat-2",
    "resolution": "30m"
  }
}
```

**Response (201 Created):**

```json
{
  "measurementId": "MSR-20251220-001",
  "glacierId": "GLR-001-HIM",
  "status": "accepted",
  "validationScore": 0.98,
  "createdAt": "2025-12-25T10:05:00Z"
}
```

#### Get Measurement History

```http
GET /glaciers/{glacierId}/measurements
```

**Query Parameters:**

| Parameter | Type | Description | Default |
|-----------|------|-------------|---------|
| start | ISO8601 | Start date | 30 days ago |
| end | ISO8601 | End date | now |
| parameter | string | Filter by parameter (mass/area/volume) | all |
| limit | integer | Results per page | 50 |

**Response (200 OK):**

```json
{
  "glacierId": "GLR-001-HIM",
  "measurements": [
    {
      "measurementId": "MSR-20251220-001",
      "timestamp": "2025-12-20T14:30:00Z",
      "massBalance": {
        "totalMass": {
          "value": 450.5,
          "unit": "Gt"
        }
      }
    }
  ],
  "summary": {
    "count": 45,
    "period": "2025-11-20T00:00:00Z / 2025-12-20T23:59:59Z"
  }
}
```

### 3. Melt Rate Analysis

#### Get Melt Rate Trends

```http
GET /glaciers/{glacierId}/melt-rate
```

**Query Parameters:**

| Parameter | Type | Description | Default |
|-----------|------|-------------|---------|
| period | string | Time period (1y/5y/10y/all) | 5y |
| resolution | string | Data resolution (daily/monthly/yearly) | monthly |

**Response (200 OK):**

```json
{
  "glacierId": "GLR-001-HIM",
  "period": {
    "start": "2020-12-25T00:00:00Z",
    "end": "2025-12-25T00:00:00Z",
    "duration": "5 years"
  },
  "meltRate": {
    "current": {
      "value": 2.3,
      "unit": "Gt/year"
    },
    "trend": {
      "acceleration": 0.08,
      "direction": "increasing",
      "confidence": 0.94
    },
    "seasonal": {
      "summer": 4.2,
      "winter": 0.4,
      "unit": "Gt/season"
    }
  },
  "contributingFactors": {
    "temperatureAnomaly": 1.8,
    "albedoChange": -0.05,
    "precipitationChange": -12.5
  }
}
```

#### Calculate Future Projections

```http
POST /glaciers/{glacierId}/projections
Content-Type: application/json
```

**Request Body:**

```json
{
  "timeHorizon": 50,
  "scenario": "SSP2-4.5",
  "parameters": {
    "temperatureIncrease": 2.0,
    "precipitationChange": -10,
    "sensitivity": 0.15
  }
}
```

**Response (200 OK):**

```json
{
  "glacierId": "GLR-001-HIM",
  "scenario": "SSP2-4.5",
  "projections": {
    "year2050": {
      "mass": 390.2,
      "meltRate": 3.5,
      "percentLoss": 13.4
    },
    "year2075": {
      "mass": 325.8,
      "meltRate": 4.8,
      "percentLoss": 27.7
    },
    "year2100": {
      "mass": 245.3,
      "meltRate": 6.2,
      "percentLoss": 45.5
    }
  },
  "confidence": 0.82
}
```

### 4. Environmental Monitoring

#### Submit Environmental Data

```http
POST /glaciers/{glacierId}/environment
Content-Type: application/json
```

**Request Body:**

```json
{
  "timestamp": "2025-12-20T14:30:00Z",
  "temperature": {
    "surface": {
      "value": -5.2,
      "unit": "°C"
    },
    "anomaly": 1.8
  },
  "albedo": {
    "value": 0.65,
    "change": -0.02
  },
  "precipitation": {
    "annual": 2500,
    "snowfall": 2100,
    "rainfall": 400,
    "unit": "mm"
  }
}
```

**Response (201 Created):**

```json
{
  "conditionId": "ENV-20251220-001",
  "glacierId": "GLR-001-HIM",
  "status": "recorded",
  "createdAt": "2025-12-25T10:10:00Z"
}
```

### 5. Sea Level Impact

#### Get Sea Level Contribution

```http
GET /glaciers/{glacierId}/sea-level-impact
```

**Response (200 OK):**

```json
{
  "glacierId": "GLR-001-HIM",
  "historical": {
    "contribution": 0.045,
    "period": "2000-2025",
    "unit": "mm"
  },
  "projected": {
    "year2050": 0.082,
    "year2100": 0.156,
    "unit": "mm"
  },
  "globalContext": {
    "percentOfTotal": 0.0012,
    "ranking": 47
  }
}
```

#### Get Regional Summary

```http
GET /regions/{region}/sea-level-impact
```

**Response (200 OK):**

```json
{
  "region": "Himalaya",
  "glacierCount": 152,
  "totalMass": 38420.5,
  "seaLevelContribution": {
    "historical": 2.34,
    "projected2050": 4.21,
    "projected2100": 8.67,
    "unit": "mm"
  }
}
```

### 6. Water Resource Assessment

#### Get Water Supply Impact

```http
GET /glaciers/{glacierId}/water-supply
```

**Response (200 OK):**

```json
{
  "glacierId": "GLR-001-HIM",
  "waterSupply": {
    "current": {
      "annualFlow": 9.2,
      "seasonalPeak": "June-August",
      "unit": "km³/year"
    },
    "projected": {
      "year2050": 7.1,
      "year2100": 4.3,
      "changePercent": -53.3
    }
  },
  "downstreamDependency": {
    "population": 125000,
    "agricultureArea": 45000,
    "hydropower": 250,
    "criticalityLevel": "high"
  }
}
```

### 7. Preservation Actions

#### Submit Preservation Action

```http
POST /glaciers/{glacierId}/preservation-actions
Content-Type: application/json
```

**Request Body:**

```json
{
  "actionType": "reflective_materials",
  "implementation": {
    "startDate": "2025-06-01T00:00:00Z",
    "coverage": 15000,
    "investment": 500000
  },
  "methodology": {
    "technique": "geotextile_blankets",
    "materials": ["UV-resistant_fabric", "reflective_coating"],
    "expectedReduction": 30
  }
}
```

**Response (201 Created):**

```json
{
  "actionId": "ACT-20250601-001",
  "glacierId": "GLR-001-HIM",
  "status": "planned",
  "createdAt": "2025-12-25T10:15:00Z"
}
```

#### Track Action Effectiveness

```http
GET /glaciers/{glacierId}/preservation-actions/{actionId}/effectiveness
```

**Response (200 OK):**

```json
{
  "actionId": "ACT-20250601-001",
  "implementation": {
    "startDate": "2025-06-01T00:00:00Z",
    "status": "active",
    "coverage": 15000,
    "unit": "m²"
  },
  "effectiveness": {
    "meltReduction": 28.5,
    "albedoIncrease": 0.12,
    "costPerTon": 217,
    "sustainabilityScore": 0.87
  },
  "monitoring": {
    "lastAssessment": "2025-12-15T00:00:00Z",
    "nextAssessment": "2026-03-15T00:00:00Z"
  }
}
```

## Webhook Notifications

Subscribe to real-time updates for glacier events:

```http
POST /webhooks
Content-Type: application/json
```

**Request Body:**

```json
{
  "url": "https://your-server.com/webhook",
  "events": ["measurement_submitted", "critical_melt_rate", "preservation_milestone"],
  "glacierIds": ["GLR-001-HIM", "GLR-002-ALP"]
}
```

**Webhook Payload Example:**

```json
{
  "event": "critical_melt_rate",
  "glacierId": "GLR-001-HIM",
  "timestamp": "2025-12-25T10:20:00Z",
  "data": {
    "meltRate": 5.2,
    "threshold": 5.0,
    "severity": "high"
  }
}
```

## Error Responses

### Standard Error Format

```json
{
  "error": {
    "code": "INVALID_PARAMETER",
    "message": "Mass value cannot be negative",
    "details": {
      "field": "massBalance.totalMass.value",
      "value": -10.5,
      "constraint": "value >= 0"
    }
  }
}
```

### HTTP Status Codes

| Code | Description |
|------|-------------|
| 200 | Success |
| 201 | Created |
| 400 | Bad Request (invalid parameters) |
| 401 | Unauthorized (missing/invalid token) |
| 403 | Forbidden (insufficient permissions) |
| 404 | Not Found (glacier/resource doesn't exist) |
| 429 | Too Many Requests (rate limit exceeded) |
| 500 | Internal Server Error |

## Rate Limiting

- **Free tier**: 100 requests/hour
- **Standard tier**: 1,000 requests/hour
- **Enterprise tier**: 10,000 requests/hour

Rate limit headers:

```http
X-RateLimit-Limit: 1000
X-RateLimit-Remaining: 847
X-RateLimit-Reset: 1640444400
```

## Versioning

API versions are specified in the URL path. Breaking changes increment the major version:

- v1: Current stable version
- v2: Planned for Q2 2026 (backward-incompatible changes)

## SDKs and Libraries

Official SDKs available:

- **JavaScript/TypeScript**: `npm install @wia/glacier-preservation`
- **Python**: `pip install wia-glacier-preservation`
- **Go**: `go get github.com/wia/glacier-preservation-go`
- **Java**: Maven/Gradle package available

---

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