25:["$","title",null,{"children":"HES E-178 Homework 2 | Austin McGee | Observable"}] 4b:T40e,states = { started; const states = [{ year: 0, atmo: i_atmo, tBio: i_tBio, mBio: i_mBio, tDead: i_tDead, mDead: i_mDead, fossil: i_fossil, emissions: r_fossil }] yield states let i = 0 for (const y of ticker()) { await y if (i++ === simulationLength) { break; } const state = states[states.length - 1] const d = getDelta(state) states.push({ year: i, atmo: Math.max(0, state.atmo - d.tPhoto - d.mPhoto + d.tResp + d.mResp + d.tDecomp + d.mDecomp + state.emissions), // Use emissions from previous year! tBio: Math.max(0, state.tBio + d.tPhoto - d.tResp - d.tDeath), mBio: Math.max(0, state.mBio + d.mPhoto - d.mResp - d.mDeath), tDead: Math.max(0, state.tDead + d.tDeath - d.tDecomp), mDead: Math.max(0, state.mDead + d.mDeath - d.mDecomp), fossil: Math.max(0, state.fossil - state.emissions), // Use emissions from previous year! emissions: Math.max(0, state.emissions + d.eChange) }) yield states } }4c:[] 47:{"id":"f765dffb0339e01e","slug":"hes-e-178-homework-2","title":"HES E-178 Homework 2","thumbnail":"88c1cbe1d0cd8767e4a343878d525f8a0a931165d406b4aba672899d592f9a91","access_level":"public","create_time":"$D2021-03-01T20:39:46.325Z","update_time":"$D2021-03-02T02:20:04.443Z","view_time":null,"first_public_time":"$D2021-03-02T01:27:43.610Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"9ddb6795c7c5d1db","login":"amcgee","name":"Austin McGee","avatar_url":"https://avatars-next.observableusercontent.com/54dfca0f48be1de2a8506b8f22947af74aa0efb3ec21c81e1f09645ae295d725","tier":"starter_2024","bio":"","following":false},"version":1114,"publish_version":1114,"role":null,"authored":false,"authors":[{"type":"individual","id":"7217a66ad66c08f4","login":"amcgee","name":"Austin McGee","avatar_url":"https://avatars-next.observableusercontent.com/54dfca0f48be1de2a8506b8f22947af74aa0efb3ec21c81e1f09645ae295d725","tier":null,"bio":"","following":false}],"members":[{"type":"individual","id":"7217a66ad66c08f4","login":"amcgee","name":"Austin McGee","avatar_url":"https://avatars-next.observableusercontent.com/54dfca0f48be1de2a8506b8f22947af74aa0efb3ec21c81e1f09645ae295d725","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"titling":"auto","title":"HES E-178 Homework 2","cells":[{"id":0,"value":"md`# HES E-178 Homework 2`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":228,"value":"md`## Simulate`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":623,"value":"{\n started;\n\n const atmo = svg``;\n const tBio = svg``;\n const mBio = svg``;\n const tDead = svg``;\n\n const chart = html``;\n\n for (let i = 0, n = 300; i < n; ++i) {\n const t = (i + 1) / n;\n // path.setAttribute(\"stroke-dasharray\", `${t * lineLength},${lineLength}`);\n yield chart;\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":234,"value":"viewof started = Button(\"Restart Simulation\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":684,"value":"md`\n**Year**: ${state.year}\n\n**Current Stocks:** \n- **Atmosphere** = ${Math.round(state.atmo * 100) / 100} Gt\n- **Terrestrial Biosphere** = ${Math.round(state.tBio * 100) / 100} Gt\n- **Marine Biosphere** = ${Math.round(state.mBio * 100) / 100} Gt\n- **Terrestrial Dead Organic Matter** = ${Math.round(state.tDead * 100) / 100} Gt\n- **Marine Dead Organic Matter** = ${Math.round(state.mDead * 100) / 100} Gt (not graphed)\n- **Fossil Fuels** = ${Math.round(state.fossil * 100) / 100} Gt (not graphed)\n\nEmission rate: ${Math.round(state.emissions * 100) / 100} Gt/year`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":993,"value":"{\n if (!complete) {\n const width = (states.length / simulationLength) * 100 + \"%\"\n const div = html`

`;\n return div;\n }\n return Table(states.map((s, i) => ({ ...s, ...(i === 0 ? {} : getDelta(states[i - 1])) })))\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":868,"value":"md`## Controls`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":759,"value":"viewof e_fossil = Range([-100,50], { step: 0.1, value: 0, label: 'Fossil Fuel Emissions Change (% / year)' })","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":406,"value":"viewof mode = Radio([\"constant\", \"feedback\"], {value: \"feedback\", label: \"Simulation Mode\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":738,"value":"viewof speed = Range([0,1000], { step: 10, value: 500, label: 'Simulation Speed (years / minute)' })","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":10,"value":"md`---\n \n \n\n## Constants`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":12,"value":"viewof simulationLength = Range([0, 500], {value: 100, step: 1, label: \"Length of simulation (years)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":76,"value":"md`### Initial Values`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":78,"value":"viewof i_atmo = Range([0,20000], { step: 1, value: 690, label: \"Atmosphere (Gt)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":99,"value":"viewof i_tBio = Range([0,20000], { step: 1, value: 450, label: \"Terrestrial Biosphere (Gt)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":106,"value":"viewof i_mBio = Range([0,20000], { step: 1, value: 7, label: \"Marine Biosphere (Gt)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":111,"value":"viewof i_tDead = Range([0,20000], { step: 1, value: 700, label: \"Terrestrial Dead Organic Matter (Gt)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":113,"value":"viewof i_mDead = Range([0,20000], { step: 1, value: 3000, label: \"Marine Dead Organic Matter (Gt)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":123,"value":"viewof i_fossil = Range([0,20000], { step: 1, value: 10000, label: \"Fossil Fuels\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":195,"value":"md`Total carbon stocks in the **natural** carbon cycle (excluding fossil fuels) : **${i_atmo + i_tBio + i_mBio + i_tDead + i_mDead} Gt**`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":208,"value":"md`Total carbon stocks in the entire system (including fossil fuels) : **${i_atmo + i_tBio + i_mBio + i_tDead + i_mDead + i_fossil} Gt**`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":124,"value":"md`### Current Rates`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":127,"value":"viewof r_tPhoto = Range([0,100], { step: 0.1, value: 48, label: \"Terrestrial Photosynthesis (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":130,"value":"viewof r_tResp = Range([0,100], { step: 0.1, value: 23, label: \"Terrestrial Respiration (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":132,"value":"viewof r_tDeath = Range([0,100], { step: 0.1, value: 25, label: \"Terrestrial Death (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":136,"value":"viewof r_tDecomp = Range([0,100], { step: 0.1, value: 25, label: \"Terrestrial Decomposition (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":143,"value":"viewof r_mPhoto = Range([0,100], { step: 0.1, value: 35, label: \"Marine Photosynthesis (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":147,"value":"viewof r_mResp = Range([0,100], { step: 0.1, value: 5, label: \"Marine Respiration (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":156,"value":"viewof r_mDeath = Range([0,100], { step: 0.1, value: 30, label: \"Marine Death (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":160,"value":"viewof r_mDecomp = Range([0,100], { step: 0.1, value: 30, label: \"Marine Decomposition (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":495,"value":"viewof r_fossil = Range([0,100], { step: 0.1, value: 5.5, label: \"Fossil Fuel Emissions (Gt/year)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2,"value":"md`---\n \n \n \n## Logic`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":506,"value":"$4b","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":522,"value":"function getDelta(state) {\n if (mode === 'constant') {\n return {\n tPhoto: r_tPhoto,\n mPhoto: r_mPhoto,\n tResp: r_tResp,\n mResp: r_mResp,\n tDeath: r_tDeath,\n mDeath: r_mDeath,\n tDecomp: r_tDecomp,\n mDecomp: r_mDecomp,\n eChange: 0\n }\n }\n \n // Calculate feedback\n return {\n tPhoto: r_tPhoto * state.atmo / i_atmo,\n mPhoto: r_mPhoto * state.atmo / i_atmo,\n tResp: r_tResp * state.tBio / i_tBio,\n mResp: r_mResp * state.mBio / i_mBio,\n tDeath: r_tDeath * state.tBio / i_tBio,\n mDeath: r_mDeath * state.mBio / i_mBio,\n tDecomp: r_tDecomp * state.tDead / i_tDead,\n mDecomp: r_mDecomp * state.mDead / i_mDead,\n eChange: state.emissions * (e_fossil / 100)\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1083,"value":"md`---\n \n \n \n## Appendix`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1015,"value":"complete = count >= simulationLength","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":517,"value":"function* ticker() {\n while (true) {\n yield 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}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":601,"value":"x = d3.scaleLinear()\n .domain([0, simulationLength])\n .range([margin.left, width - margin.right])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":598,"value":"y = d3.scaleLinear()\n .domain([0, d3.max(states, s => s.atmo)])\n .range([height - margin.bottom, margin.top])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":609,"value":"xAxis = (g, scale = x) => g\n .attr(\"transform\", `translate(0,${height - margin.bottom})`)\n .call(d3.axisBottom(scale).ticks(width / 80).tickSizeOuter(0))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":611,"value":"yAxis = (g, scale = y) => g\n .attr(\"transform\", `translate(${margin.left},0)`)\n .call(d3.axisLeft(scale).ticks(height / 40))\n .call(g => g.select(\".domain\").remove())","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":613,"value":"height = 240","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":605,"value":"margin = ({top: 20, right: 30, bottom: 30, left: 40})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":40,"value":"md`## Imports`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":42,"value":"import {Button, Checkbox, Toggle, Radio, Range, Select, Text, Textarea, Search, Table} from \"@observablehq/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":595,"value":"d3 = 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