Sphere EMEP - ESRI:104128

WKT

GEOGCS["GCS_Sphere_EMEP", 
	DATUM["D_Sphere_EMEP", 
		SPHEROID["Sphere_EMEP", 6370000.0, 0.0]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_Sphere_EMEP", 
	DATUM["D_Sphere_EMEP", 
		ELLIPSOID["Sphere_EMEP", 6370000.0, 0.0]], 
	PRIMEM["Greenwich", 0.0], 
	CS[ellipsoidal, 2], 
	AXIS["Longitude (lon)", east, 
		ORDER[1]], 
	AXIS["Latitude (lat)", north, 
		ORDER[2]], 
	ANGLEUNIT["Degree", 0.0174532925199433], 
	ID["Esri", "104128"]]

Data from @esri/proj-codes

{
  "wkid": 104128,
  "latestWkid": 104128,
  "macro": "PE_GCS_SPHERE_EMEP",
  "name": "GCS_Sphere_EMEP",
  "wkt": "GEOGCS[\"GCS_Sphere_EMEP\",DATUM[\"D_Sphere_EMEP\",SPHEROID[\"Sphere_EMEP\",6370000.0,0.0]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_Sphere_EMEP\",DATUM[\"D_Sphere_EMEP\",ELLIPSOID[\"Sphere_EMEP\",6370000.0,0.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Longitude (lon)\",east,ORDER[1]],AXIS[\"Latitude (lat)\",north,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433],ID[\"Esri\",\"104128\"]]",
  "description": "Sphere EMEP",
  "authority": "Esri",
  "version": "9.0.0",
  "deprecated": "no",
  "areaname": "Europe",
  "extent": {
    "slat": 34,
    "nlat": 85,
    "llon": -30,
    "rlon": 50
  }
}