25:["$","title",null,{"children":"El Nino / La Nina Observation | JAXA Earth API | Observable"}] 4b:T490,{ const span1 = document.createElement("span"); span1.innerHTML = "Mean value of the image3_nino3:"; const span2 = document.createElement("span"); span2.innerHTML = mean.toFixed(2); span2.style.fontSize = "2em"; span2.style.fontWeight = "bold"; span2.style.margin = "3px"; const span3 = document.createElement("span"); span3.innerHTML = "[degC]"; span3.style.fontWeight = "bold"; const span4 = document.createElement("span"); span4.style.fontWeight = "bold"; if(mean >= 0.5){ span2.style.color = "red"; span3.style.color = "red"; span4.style.color = "red"; span4.innerHTML = " (Possibility of El Nino)"; }else if(mean <= -0.5){ span2.style.color = "blue"; span3.style.color = "blue"; span4.style.color = "blue"; span4.innerHTML = " (Possibility of La Nina)"; } const div = document.createElement("div"); div.style.backgroundColor = "#f5f5f5"; div.style.padding = "8px"; div.appendChild(span1); div.appendChild(document.createElement("br")); div.appendChild(span2); div.appendChild(span3); div.appendChild(document.createElement("br")); div.appendChild(span4); return div; }4c:[] 47:{"id":"2a043e9eb358c875","slug":"elnino-lanina","title":"El Nino / La Nina Observation","thumbnail":"42614f715ded06de3ab7a84922bc4718681564173ce253d5a3a881644833040f","access_level":"public","create_time":"$D2023-07-12T10:36:23.730Z","update_time":"$D2026-06-15T03:30:23.217Z","view_time":null,"first_public_time":"$D2023-07-12T10:36:23.730Z","has_unpublished_edits":null,"fork":{"id":"456e09cc02531b00","slug":"lst-anomaly2","title":"地表面温度の平年差","owner":{"id":"411535fdb90d452a","login":"jaxa-earth","name":"JAXA Earth API"}},"stars":0,"starred":false,"owner":{"type":"team","id":"411535fdb90d452a","login":"jaxa-earth","name":"JAXA Earth API","avatar_url":"https://avatars-next.observableusercontent.com/3574f222a67ac2f60e81e6c5c088915d4a0692872e9e2edb8328ad3058cac231","tier":"starter_2024","bio":"\"JAXA Earth API for JavaScript\" examples on the Observable by the JAXA Earth Observation Research Center","followed_by_you":false,"follows_you":false},"version":565,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"f387a7816ad4e25c","login":"jaxa-earth","name":"JAXA Earth API","avatar_url":"https://avatars-next.observableusercontent.com/3574f222a67ac2f60e81e6c5c088915d4a0692872e9e2edb8328ad3058cac231","tier":null,"bio":"\"JAXA Earth API for JavaScript\" examples on the Observable by the JAXA Earth Observation Research Center","followed_by_you":false,"follows_you":false}],"members":[{"type":"individual","id":"f387a7816ad4e25c","login":"jaxa-earth","name":"JAXA Earth API","avatar_url":"https://avatars-next.observableusercontent.com/3574f222a67ac2f60e81e6c5c088915d4a0692872e9e2edb8328ad3058cac231","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":true,"trashed":false,"lapsed":null,"subscribed":null,"forks":4,"collection":{"id":"2e47f2d1b9e594f1","slug":"anomaly","title":"Anomaly","owner":{"id":"411535fdb90d452a","login":"jaxa-earth","name":"JAXA Earth API"}},"type":"notebook","body":{"titling":"auto","title":"El Nino / La Nina Observation","cells":[{"id":0,"value":"# El Nino / La Nina Observation\n# エルニーニョ/ラニーニャ現象の発生状況\n\nObservation of El Nino/La Nina phenomena by using the sea surface temperature data from the JAXA GCOM-W satellite. The Daily Sea Level Analysis for Climate Monitoring and Forecasting (COBE-SST version 2) is used as a normal data.\n\nJAXA GCOM-W衛星の海面水温のデータを使って、エルニーニョ/ラニーニャ現象の発生状況を確認します。平年値のデータセットはDaily Sea Surface Analysis for Climate Monitoring and Predictions (COBE-SST version 2)を利用します。","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":5,"value":"//Load the API module\nje = import(\"https://data.earth.jaxa.jp/api/javascript/v2.0.1/jaxa.earth.esm.js\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":152,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":154,"value":"## Date and Bbox (Area)\n## 日時と緯度経度範囲","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":128,"value":"//Date for observation\n\n//The newest data will be get.\ndate = new Date();\n\n//Specified date\n// date = new Date(\"2023-03-01T00:00:00Z\"); //UTC","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":9,"value":"//Bounding box of the area for observation\nbbox = [-180, -30, 0, 30]; //west, south, east, north","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":150,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":21,"value":"## Get Sea Surface Temperature (SST) Data\n\n## 海面温度のデータを取得","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":7,"value":"dataObject1 = await je.getDataObject({\n collectionUrl: \"https://s3.ap-northeast-1.wasabisys.com/je-pds2/cog/v1/JAXA.G-Portal_GCOM-W.AMSR2_standard.L3-SST.nighttime.v4_global_daily/collection.json\",\n band: \"SST\",\n bbox,\n date,\n width: 300, //pixel\n height: 100, //pixel\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":517,"value":"colorMap = new je.image.ColorMap({\n min: 14,\n max: 32,\n colors: je.Colors.JET,\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":168,"value":"dataObject1.formattedDate","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":18,"value":"je.image.createCanvas(dataObject1, colorMap)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":136,"value":"colorMap.createLegendCanvas(300, 30, 10, dataObject1.unit) //width, height, text size, unit","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":43,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":25,"value":"## Get Normal Sea Surface Temperature Data (Climatology)\n\n## 海面温度の平年値のデータを取得","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":28,"value":"dataObject2 = await je.getDataObject({\n collectionUrl: \"https://s3.ap-northeast-1.wasabisys.com/je-pds2/cog/v1/JMA_COBE-SST-interpolation_SST.v2_global_daily-normal/collection.json\",\n\tband: \"SST\",\n bbox,\n date: dataObject1.date,\n width: 300,\n height: 100,\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":172,"value":"dataObject2.formattedDate","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":35,"value":"je.image.createCanvas(dataObject2, colorMap)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":141,"value":"colorMap.createLegendCanvas(300, 30, 10, dataObject2.unit)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":76,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":45,"value":"## Calculate Anomaly\n\n## 平年値との差を算出","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":196,"value":"dataObject3 = je.data.compute({\n\tdataObjects: [dataObject1, dataObject2],\n\n\t//ピクセル間の演算方法を定義（引数はdataObjectsの配列の順番と同一）\n\toperation: (value_of_dataObject1, value_of_dataObject2) => value_of_dataObject1 - value_of_dataObject2,\n\n\tunit: \"degC\",\n\tdate: dataObject1.data,\n\tformattedDate: dataObject1.formattedDate,\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":528,"value":"//-3～3℃を青～白～赤に塗るカラーバーを設定\ncolorMap3 = new je.image.ColorMap({\n min: -3,\n max: 3,\n colors: je.Colors.JET,\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":198,"value":"je.image.createCanvas(dataObject3, colorMap3)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":200,"value":"colorMap3.createLegendCanvas(300, 30, 10, dataObject3.unit)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":249,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":247,"value":"# Observation in the NINO.3 Area\n# エルニーニョ監視海域(NINO.3)の確認\n\nCalculate statistical values in the El Nino monitoring area (NINO.3) (longitude -150 to -90 degrees, latitude ±5 degrees).\n\nエルニーニョ監視海域(NINO.3)（経度-150～-90度、緯度±5度）の範囲について統計値を求めます。","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":256,"value":"bbox_nino3 = [-150, -5, -90, 5];","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":286,"value":"---\n## Get Sea Surface Temperature Data in the NINO.3\n## 海面水温","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":258,"value":"dataObject1_nino3 = await je.getDataObject({\n collectionUrl: \"https://s3.ap-northeast-1.wasabisys.com/je-pds2/cog/v1/JAXA.G-Portal_GCOM-W.AMSR2_standard.L3-SST.nighttime.v4_global_daily/collection.json\",\n band: \"SST\",\n bbox: bbox_nino3,\n date,\n width: 300, //pixel\n height: 50, //pixel\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":559,"value":"dataObject1_nino3.formattedDate","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":260,"value":"je.image.createCanvas(dataObject1_nino3, colorMap)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":277,"value":"colorMap.createLegendCanvas(300, 30, 10, dataObject1_nino3.unit) //width, height, text size, unit","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":290,"value":"---\n## Get Normal Sea Surface Temperature Data (Climatology) in the NINO.3\n## 海面水温の平年値","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":263,"value":"dataObject2_nino3 = await je.getDataObject({\n collectionUrl: \"https://s3.ap-northeast-1.wasabisys.com/je-pds2/cog/v1/JMA_COBE-SST-interpolation_SST.v2_global_daily-normal/collection.json\",\n band: \"SST\",\n bbox: bbox_nino3,\n date: dataObject1_nino3.date,\n width: 300, //pixel\n height: 50, //pixel\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":561,"value":"dataObject2_nino3.formattedDate","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":265,"value":"je.image.createCanvas(dataObject2_nino3, colorMap)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":275,"value":"colorMap.createLegendCanvas(300, 30, 10, dataObject2_nino3.unit) //width, height, text size, unit","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":294,"value":"---\n## Calculate Anomaly in the NINO.3\n## 海面水温の平年差","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":268,"value":"dataObject3_nino3 = je.data.compute({\n\tdataObjects: [dataObject1_nino3, dataObject2_nino3],\n\n\t//ピクセル間の演算方法を定義（引数はdataObjectsの配列の順番と同一）\n\toperation: (value_of_dataObject1, value_of_dataObject2) => value_of_dataObject1 - value_of_dataObject2,\n\n\tunit: \"degC\",\n\tdate: dataObject1_nino3.data,\n\tformattedDate: dataObject1_nino3.formattedDate,\n});","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":270,"value":"je.image.createCanvas(dataObject3_nino3, colorMap3)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":273,"value":"colorMap3.createLegendCanvas(300, 30, 10, dataObject3_nino3.unit)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":279,"value":"---\n## Anomaly of Sea Surface Temperature in the NINO.3\n## エルニーニョ監視海域(NINO.3)の海面水温の平年差","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":504,"value":"//Mean value of the image3_nino3\nmean = je.data.globalStat(dataObject3_nino3).mean","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":421,"value":"$4b","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":300,"value":"If this value continues +0.5°C or more for a few months, it is called an El Nino phenomenon, and if it continues -0.5°C or less, it is called a La Nina phenomenon. (There are cases that different definitions are used in different countries)\n\nこの値が数か月間※、+0.5℃以上を継続する場合にエルニーニョ現象、-0.5℃以下を継続する場合にラニーニャ現象と呼ばれます。※気象庁の定義では「5か月移動平均値が6か月以上」\n\n参考サイト：\nEl Nino Watch by JAXA Earth Observation Research Center","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":486,"value":"## Plot histogram\n## ヒストグラムを表示","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":479,"value":"plotData = {\n //Float32Array\n const validData = dataObject3_nino3.data.filter(e => !isNaN(e));\n \n const plotData = [];\n for(let i=0;i